How to Cut Brownies Cleanly Into Even Squares Every Time

Bench scraper lifting diced onion and chopped herbs from a wooden board toward a pan

Cool the pan completely, lift the whole slab out on a parchment sling, mark a grid against a ruler, and press a wide blade straight down through each line instead of drawing a knife across it. That is how to cut brownies cleanly, and the pressing part is the step most people skip: a knife pulled through fudge drags the soft center along the cut, and every square after the first wears a smear of the one before.

Even squares are arithmetic once the slab is out of the pan. The Love and Lemons brownie recipe bakes an 8 x 8 in (20 x 20 cm) pan into 16 pieces, which is a 4 by 4 grid at 2 in (5 cm) per square, and a straight edge with a ruler on it, like the Houseland bench scraper with its etched 0 to 5 in scale in 1/8 in steps, turns that into four marks per side and eight presses.

Macro of the brushed steel blade edge and the moulded handle bond on a bench scraper
PicturedStainless Steel Bench Scraper and Dough Cutter.See 3 colours & current price

How to cut brownies cleanly into even squares?

Cold slab, parchment sling, marked grid, straight-down press, wiped blade between cuts. Each step removes one cause of a ragged square.

  • Cool the pan fully. Love and Lemons gives about 2 hours for an 8 x 8 in (20 x 20 cm) pan baked at 325°F (163°C) for 40 to 48 minutes, and notes the brownies keep firming the longer they are out of the oven.
  • Line the pan before baking with a parchment sling that overhangs two sides by 2 in (5 cm), so the cooled slab lifts out in one piece and you cut on a board instead of scraping the pan.
  • Trim the outer 0.25 in (6 mm) if the edges are much drier than the middle; you are cutting the crisp rim away so every square is the same texture.
  • Measure and mark the grid before the first cut. For 16 squares from 8 in, that is marks at 2, 4 and 6 in (5, 10 and 15 cm) on all four sides.
  • Cut by pressing straight down with a blade at least as long as the slab, lift it straight up, wipe it, and press the next line. Never saw.

The fudgier the recipe, the more each of those steps matters. Wikipedia describes brownies as either fudgy or cakey by density, and notes that the early recipes that creamed the butter and sugar came out cakey while an extra egg and extra chocolate made them fudgier. A cakey brownie cuts like a cake; a fudgy one cuts like cold caramel, and only the pressing method handles that.

Why does the knife drag fudge through every cut?

A knife drawn across a brownie shears the soft interior sideways, and the fudge sticks to the steel and rides along the blade into the next square. A serrated knife is worst, because every tooth carries its own load of crumb and chocolate. A thin chef's knife is better but still moves lengthwise through the slab, and lengthwise movement is the smear. A warm slab makes it worse again: the center of a fudgy 8 x 8 in (20 x 20 cm) pan is still soft an hour after baking, which is why the recipe waits about 2 hours before slicing.

Three things stop the drag. Cold sets the fat so the interior holds its shape; a straight-down press moves the blade vertically only, so nothing gets pulled along the row; and a wiped blade brings no fudge from the last cut into this one. A long, wide blade adds a fourth: one press covers the whole 8 in (20 cm) line at once, so there is no restart in the middle of the slab where a short knife has to be repositioned.

  • Serrated bread knife: tears the top crust, loads the teeth with fudge. Avoid.
  • Thin chef's knife, wiped and dipped in hot water between cuts: clean, but slow and easy to tilt off the line.
  • Wide straight blade pressed down: cleanest through a fudgy center, and the fastest of the three.

How do you mark an even grid without a ruler on the knife?

Measure the slab, divide by the count per side, and nick the parchment edge at each mark before cutting anything. A bench scraper with a ruler on the blade does the measuring and the cutting in the same hand.

  1. Set the cooled slab on a board with the parchment still under it. Measure one side; an 8 x 8 in (20 x 20 cm) pan gives a slab a little under 8 in once the edges are trimmed.
  2. Divide by the number of pieces you want along that side. Four pieces across 8 in is a mark every 2 in (5 cm); five pieces is every 1.6 in, which is where a ruler in 1/8 in steps earns its place, because 1.6 in sits between 1 5/8 and 1 1/2.
  3. Lay the etched edge of the Houseland scraper against the slab and nick the surface at each mark on all four sides with the corner of the blade. The scale runs 0 to 5 in along the cutting edge, so an 8 in side takes two placements.
  4. Press the full 6.3 in (16 cm) blade straight down through the first line, connecting the nicks on opposite sides. Lift straight up, wipe the blade on a damp cloth, and press the next line. Finish all the cuts in one direction, then turn the board 90 degrees and do the other direction.
  5. Separate the squares with the flat of the same blade and slide them off the parchment onto a plate. The blade is 4.72 in (12 cm) tall, so a whole row lifts at once.

The scraper edge is a straight square pressing edge, not a knife, and the listing is honest that it presses through brownies and dough but will not do the job of a knife on a hard baked crust. If your pan has a thick, glassy top, score that crust first with the corner, then press. Cutting on a steel board keeps the cut edges from picking up wood fibers, and the large steel board article explains why a flat, non-porous surface makes the press cleaner.

Hand holding a stainless steel bench scraper to show its size against an open palm
PicturedStainless Steel Bench Scraper and Dough Cutter.See 3 colours & current price
Four bench scrapers with coloured handles on a wooden board beside portioned dough

From the shop

Stainless Steel Bench Scraper and Dough Cutter

The blade is 6.3 in (16 cm) wide and 4.72 in (12 cm) tall with an etched 0 to 5 in ruler in 1/8 in steps, so one press covers a whole line and the grid is marked from the same edge. It is a square pressing edge, not a knife, and it is hand wash only.

View the stainless steel bench scraper — 3 colours & current price

Knife vs bench scraper vs plastic knife: which cuts brownies cleanest?

A wide straight blade pressed down wins on fudgy brownies; a thin, hot, wiped chef's knife is the fallback; a plastic knife is only for pans you cannot lift the slab out of.

Tool Fudgy brownie Cakey brownie Cuts per 8 in (20 cm) line Weak point
Serrated knife Smears, tears crust Acceptable Sawing, many strokes Teeth load with fudge
Chef's knife, hot and wiped Clean if wiped every cut Clean 1 to 2 draws Tilts off the line; slow
Bench scraper, pressed Cleanest Clean 1 press per line Not for hard crusts; hand wash
Plastic knife Less sticking than steel Fine Several draws Bends; no ruler; short

The plastic knife trick works because chocolate sticks less to plastic than to steel, and it is worth knowing for a metal pan you did not line. It still drags, because it is still a draw cut. Once the slab is out on parchment, pressing beats drawing regardless of what the blade is made of.

How long should brownies cool before cutting?

About 2 hours at room temperature for a standard 8 x 8 in (20 x 20 cm) pan, which is the figure the Love and Lemons recipe gives, and longer if the pan is thick or the recipe is very fudgy. The same recipe pulls the pan at 40 to 48 minutes at 325°F (163°C) when a toothpick comes out with a few crumbs attached, and points out that pulling early beats leaving them in, because a slightly underbaked center firms as it cools and an overbaked one only dries.

  • Room temperature, 2 hours: the standard. The surface is set and the center holds a fingerprint without oozing.
  • Refrigerator after the first hour: firmer squares and sharper corners, useful for very fudgy recipes. Let them come back toward room temperature before serving or the texture reads waxy.
  • Cutting warm: only for a cakey recipe you intend to serve straight away, and accept softer edges.

Cut squares keep in an airtight container at room temperature for up to 3 days, or frozen for up to a month, per the same recipe. Cut them all at once while the blade is out; a slab that goes back into the pan uncut dries at the exposed edge and cuts worse tomorrow.

Dimension diagram of the bench scraper, 6.3 in wide and 4.72 in tall with a 0.03 in blade
PicturedStainless Steel Bench Scraper and Dough Cutter.See 3 colours & current price

What I'd do

Line the pan, bake, walk away for 2 hours, then lift the slab onto a board and mark a 4 by 4 grid at 2 in (5 cm) with the ruler on the scraper. Eight straight-down presses, a wipe between each on a damp cloth, and the 16 squares come off the parchment on the flat of the blade. If a bar recipe is softer still, an hour in the fridge before cutting gives corners you could stack.

The scraper is 0.03 in (0.65 mm) stainless with a square edge, it is hand wash only, and it comes as one piece in black, yellow or blue rather than a set. Dry it straight after washing so the etched marks stay easy to read; the stainless cleaning article covers that in a minute. If the kitchen is short on drawer space, the small apartment tools article is a fair test of whether it earns a slot, and the kitchen tools collection has the scraper and the board it works best on.

Questions people ask about this

Should I use a hot knife to cut brownies?

It helps if you are using a knife. Dip a thin chef's knife in hot tap water, wipe it dry, draw one cut, then repeat for every line. The warmth softens the chocolate at the blade face so less sticks. A pressed straight edge on a cold slab does not need the hot water step.

Can I cut brownies straight from the fridge?

Yes, and very fudgy recipes cut best that way. Chill the slab for about an hour after the 2 hour room-temperature cool, cut it cold, then let the squares sit 20 to 30 minutes before serving so the texture is soft again rather than waxy.

How many brownies come from an 8 x 8 pan?

Sixteen at 2 in (5 cm) squares in a 4 by 4 grid, which is the yield the Love and Lemons recipe gives for its 8 x 8 in (20 x 20 cm) pan. Nine larger squares at about 2.67 in, or 25 small ones at 1.6 in, use the same slab; the ruler decides.

Why are my brownie edges hard and the middle gooey?

The pan ran hot at the sides or the bake went long. A 325°F (163°C) oven for 40 to 48 minutes with a few-crumbs toothpick is the range that recipe uses in an 8 in pan, and it warns a 9 in pan overbakes. Trim the outer 0.25 in (6 mm) before gridding if the rim is much firmer.

Do I need a parchment sling to cut brownies cleanly?

Not strictly, but it changes everything about the cut. Without it you cut inside the pan, the blade cannot press to full depth in the corners, and the first square comes out in pieces. Two strips overhanging by 2 in (5 cm) lift the whole slab onto a board.

How do I cut brownies into triangles or bars instead of squares?

Mark the same grid, then press each square on the diagonal for triangles, or double one dimension for bars. A 2 x 4 in (5 x 10 cm) bar is two grid cells; an 8 in slab gives 8 bars that way. Diagonal cuts need the slab cold or the points crumble.

Can I cut brownies with a pizza cutter?

Yes on a cakey batch, poorly on a fudgy one. A wheel is still a rolling draw cut, so it drags soft centers, and it cannot reach the last 0.5 in (1.3 cm) at a pan wall. On a lifted, cold slab it does give straight lines quickly if you run it along a straight edge.

How do I keep the top crust from cracking when I cut?

Cut cold, press rather than saw, and score the crust first. Nick the shiny top along the marked line with the corner of the blade, then press the full 6.3 in (16 cm) edge down through it. A serrated knife is the most common cause of a shattered crust.

Will the Houseland scraper cut through a hard brownie crust?

Not on its own. The product page says the square scraper edge presses through brownies and dough but is not meant for a baked crust or hard vegetables, and it will not do the job of a knife. Score a thick, glassy top with the blade corner first, then press through the softer body.

How should I store cut brownies so the edges stay clean?

In an airtight container at room temperature for up to 3 days, or frozen for up to a month, which is what the Love and Lemons recipe gives. Lay parchment between layers so the squares do not stick to each other, and cut the whole slab at once rather than a row a day.

How do I make a parchment sling for a brownie pan?

Cut two strips of parchment as wide as the pan base and long enough to overhang two opposite sides by about 2 in (5 cm). Lay one strip in, then the other crosswise, and press them into the corners. After the 2 hour cool, lift the four tabs and the slab comes out whole.

Can I cut brownies in a glass pan without lifting them out?

Yes, but expect rougher squares. Glass edges stop a blade reaching the corners and steel scratches the surface. Use a plastic knife, cut a 4 by 4 grid at 2 in (5 cm), and take the first square out with a small spatula so the rest have room.

Why do my brownie squares crumble when I lift them?

They were cut warm or cut with a drawing stroke. A fudgy 8 x 8 in (20 x 20 cm) slab needs about 2 hours to set, and a sawing cut breaks the interior along the line. Cut cold, press straight down, and lift each square on the flat of a wide blade.

How do I cut a 9 x 13 pan of brownies into even bars?

Mark 3 in (7.6 cm) along the 9 in side and 2.17 in along the 13 in side for 18 bars, or use the 1/8 in ruler steps and settle on 2 1/8 in, which gives six columns and leaves a thin trim strip. Cut the three short lines first, then the six long ones, wiping the blade every pass.

What is the best way to cut brownies into 9 big squares?

Mark at 2.67 in, which is a hair over 2 5/8 in on a 1/8 in ruler, on all four sides of an 8 in (20 cm) slab and press three lines each way. Nine squares from the Love and Lemons 8 x 8 in pan are each about a quarter larger than the 16-piece cut.

Can I cut brownies into 25 small pieces for a party?

Yes. Divide an 8 in (20 cm) slab by five: a mark every 1.6 in, which sits between 1 1/2 and 1 5/8 on a ruler in 1/8 in steps, so nick at 1 5/8, 3 1/4, 4 3/4 and 6 3/8 in. Small squares dry faster, so cut them the day you serve.

Does chilling brownies change the texture?

It firms them and can make a very fudgy batch taste waxy straight from the fridge. Chill for about an hour only to cut clean corners, then let the squares stand 20 to 30 minutes at room temperature before serving so the fat softens again.

How do I cut brownies without breaking the shiny crust?

Score the top first. Run the corner of the blade along the marked line with light pressure to break the thin sugar crust, then press the full width straight down through the body. A serrated knife shatters the crust; a pressed straight edge on a cold 2 hour slab does not.

Should I cut brownies in the pan or on a board?

On a board. Lifted out on a parchment sling, the slab lets a blade press to full depth on all four edges, and the board is flat under the cut. In the pan, the walls stop the blade in the corners and the first 0.5 in (1.3 cm) at each side is always ragged.

Why is the middle of my brownie pan raw while the edges are done?

The pan is too large or the oven too hot. Love and Lemons bakes in an 8 x 8 in (20 x 20 cm) pan at 325°F (163°C) for 40 to 48 minutes and says a 9 x 9 in pan overbakes. Test the center with a toothpick and pull when only a few crumbs cling.

How do I know brownies are done before cutting?

A toothpick in the center should come out with a few moist crumbs attached, not wet batter and not clean, at about 40 to 48 minutes at 325°F (163°C) in an 8 in pan. Pulling slightly early beats overbaking, because the center keeps firming through the 2 hour cool.

Can I cut brownies after 30 minutes if I am in a hurry?

Only a cakey batch, and only for serving right away. A fudgy 8 in (20 cm) slab is still soft at the center after 30 minutes and every cut drags. If time is short, cool 30 minutes on the counter and then 30 in the fridge, which gets closer to a set interior.

Do I wipe the blade with water or a dry cloth?

A damp cloth, then a quick dry wipe. Water alone leaves the steel wet and the next square picks up a streak; a dry cloth alone smears cold fudge around. Wipe after every press, which for a 4 by 4 grid is 6 wipes for 6 interior lines.

Is a hot knife or a cold slab more important?

The cold slab. A hot knife only helps the fudge release from the blade face, while a properly cooled 2 hour slab stops the interior moving at all. If you have to choose, chill the brownies and use a room-temperature blade pressed straight down.

How do I get the first brownie out without wrecking it?

Lift the slab out on the parchment sling so there is no first-out problem. If the pan was not lined, cut all the lines, then run a thin spatula under one corner square, lever it 0.25 in (6 mm), and slide the spatula fully under before lifting.

Can I use dental floss to cut brownies?

Unflavored floss works on a cold, lifted slab: hold it taut and press straight down the marked line, then pull one end out sideways. It cannot mark the grid and it drags on a warm center, so it is a second choice after a wide blade, but it is clean on a fudgy 2 hour slab.

How do I cut brownies with nuts or chunks inside?

Cold, and with a press rather than a draw. A pressed blade pushes a walnut piece aside or through; a sawing stroke catches on it and tears the square. If a chunk sits right on a 2 in (5 cm) line, shift that one cut by 1/8 in rather than fight it.

Why does chocolate stick to a steel blade more than plastic?

Cocoa butter bonds readily to a cold metal surface, which is why the plastic knife trick exists. Steel still cuts cleaner when it is pressed straight down and wiped between passes, because plastic bends and cannot cover an 8 in (20 cm) line in one stroke.

Can I cut brownies with the Houseland scraper while they are warm?

You can, but the squares will be soft-edged. The product page describes the square edge pressing through brownies, and it does that best on a slab cooled about 2 hours. On a warm slab even a pressed 6.3 in (16 cm) blade leaves the interior slumping toward the cut.

Will the scraper scratch my baking pan?

It can on a coated or soft-finish pan if a corner is dug in. The product page says to keep the blade flat at a low angle on wood, stone and laminate. Better to lift the slab out on parchment and cut on a board, so the blade never touches the pan at all.

Can I put the bench scraper in the dishwasher after cutting brownies?

It does not claim dishwasher safety, so hand wash it. Warm soapy water lifts cocoa butter from the 0.03 in (0.65 mm) steel in seconds; dry it straight away so the etched ruler does not water-spot.

Is the Houseland scraper a knife?

No. It has a straight square scraper edge, not a ground knife edge, and the product page says it will not do the job of a knife on a hard crust or vegetables. For brownies that is the point: a 6.3 in (16 cm) blunt edge pressed down cuts fudge without slicing it sideways.

How wide is the blade compared with a brownie pan?

The blade is 6.3 in (16 cm) wide and 4.72 in (12 cm) tall. An 8 in (20 cm) slab needs the blade placed twice per line, or one press that starts at the far edge and a second short press to finish, so nick the grid on both sides to keep the two presses aligned.

How do I read the ruler on the scraper for a 2 in grid?

The etched scale runs 0 to 5 in along the cutting edge in 1/8 in steps. Set 0 at the slab corner, nick at 2 and 4 in, then slide the blade so 0 sits on the 4 in nick and mark 2 in again for the 6 in line. The ruler is in inches only, with no centimeter scale.

Does the scraper come with a set of colours?

No, one scraper per order in black, yellow or blue, chosen at checkout. The blade, the 0 to 5 in ruler and the conversion chart are identical across all three, so the colour affects only the handle.

What else does the scraper chart on the blade show?

A cup conversion: 1 cup = 8 fl oz = 16 tbsp = 237 ml, with the same row for 1/2, 1/3 and 1/4 cup. It is there for the batter stage, not the cutting stage, but it means the one tool covers measuring and cutting for a brownie recipe.

Will the ruler marks wear off the scraper?

No, they are etched into the steel rather than printed, so washing and scraping do not lift them. They show as a recess in the brushed finish. Keep the recess clean of dried chocolate by washing right after cutting, and dry the blade to avoid water spots.

Can I cut cheesecake bars or lemon bars the same way?

Yes, and they are the recipes that benefit most. Both are softer than brownies and want a full chill, 2 hours or more in the fridge, then a pressed cut on a lifted slab with a wiped blade. A 2 in (5 cm) grid on an 8 in pan gives 16 bars of either.

How do I cut blondies cleanly?

Same as brownies: cool the 8 x 8 in (20 x 20 cm) pan about 2 hours, lift on parchment, mark a 2 in (5 cm) grid, press straight down. Blondies are usually a little cakier, so they forgive a knife better, but the pressed cut still gives the squarest corners.

Can I freeze brownies before cutting them?

Yes, and a slab frozen for about an hour cuts very cleanly. Wrap it in the parchment, freeze until firm, cut the grid, then thaw the squares 30 minutes. For longer storage the recipe allows up to a month frozen; cut first so you can thaw one square at a time.

How do I keep cut brownies from drying out?

Store them in an airtight container at room temperature for up to 3 days, per the Love and Lemons recipe, with parchment between layers. Cut edges lose moisture faster than the crust, so keep the squares pressed together in the container rather than spread out.

Should brownies be stored in the fridge?

Not for everyday storage. Room temperature in an airtight container keeps a fudgy texture for up to 3 days; the fridge firms the fat and dulls the flavor. Refrigerate only for cutting or if the batch has a cream cheese or fresh fruit layer.

Can I cut brownies the next day?

Yes, if the uncut slab was covered airtight overnight. It will be firmer and cut cleanly, though the exposed edges dry slightly. Trim 0.25 in (6 mm) from the rim if it has gone hard, then grid and press as usual.

Why do my squares get smaller toward one side of the pan?

The grid was not marked before cutting, and each cut drifted. Nick all four sides at 2 in (5 cm) intervals first, cut every line in one direction, then turn the board 90 degrees. Cutting by eye compounds a 1/8 in error into a 0.5 in difference by the last row.

How do I trim brownie edges and what do I do with them?

Press a line about 0.25 in (6 mm) inside the rim on all four sides with the blade and lift the strips off. The trimmings are the driest part of the pan, so crumble them over ice cream or freeze them for a crumb layer; the inner slab now has one texture end to end.

Do fudgy and cakey brownies need different cutting?

Yes. A cakey brownie behaves like cake and a knife handles it warm or cold. A fudgy one is dense, per the Wikipedia description of the two styles, and needs the full 2 hour cool, a lifted slab and a pressed cut. If unsure, cut as if it is fudgy.

Why did my brownie squares stick together after cutting?

They were left touching on the parchment while still warm, and the exposed fudge re-bonded. Separate the squares with the flat of the blade right after cutting and give each one 0.25 in (6 mm) of space until it has cooled fully.

Can I use a ruler and a pizza wheel on a cold slab?

Yes, for a cakey batch. Lay a ruler as a fence at each 2 in (5 cm) mark and roll along it; a straight edge keeps the wheel honest. On a fudgy slab the wheel still drags the center, so switch to pressing a wide blade for those and keep the wheel for bars with a firm set.

How thick should a brownie slab be for clean squares?

Around 1 in (2.5 cm) in an 8 x 8 in (20 x 20 cm) pan is typical for a 16 square batch. Thinner slabs under 0.75 in cut easily but dry fast; thicker ones over 1.5 in need a blade taller than the slab, which is where the 4.72 in (12 cm) scraper height helps.

What angle should the blade be when I press?

Vertical, 90 degrees to the board. Any lean turns the press into a shear and the square comes out wider at the top than the bottom. Line the blade edge up with the two nicks, look down its spine, and push with your palm on the handle rather than your fingers.

How many cuts does a 4 by 4 grid take?

Six interior lines, three in each direction, plus four trims if you remove the rim, for 10 presses at most. With a blade wiped between passes that is 2 to 3 minutes for a full 8 in (20 cm) pan, far less than sawing 16 squares out one at a time.

Can I cut brownies with a wet knife instead of a hot one?

A damp blade releases fudge a little better than a dry one, but water on the cut face dulls the crust. Wipe the blade damp then dry between passes. Pressing a wide 6.3 in (16 cm) edge straight down on a cold slab matters far more than what is on the blade.

Is it safe to leave brownies out to cool for 2 hours?

Yes. Standard brownies are a baked, low-moisture, high-sugar item, and the recipe itself keeps them at room temperature for up to 3 days. The exception is any batch with a cream cheese, custard or fresh fruit layer, which should go into the fridge once cool.

How do I cut brownies for a bake sale so they all look identical?

Trim the rim, mark a 2 in (5 cm) grid on a lifted slab from an 8 in (20 cm) pan, press every line, and wipe between passes. Then check two opposite squares against the ruler; if they differ by more than 1/8 in, the grid drifted and the next pan needs more nicks.

What is the plastic knife trick for brownies?

Cut with a disposable plastic knife because chocolate sticks to plastic less than to steel. It works in an unlined pan, but it still draws through the fudge and bends on a thick slab. On a lifted, cooled slab a pressed steel edge gives cleaner lines faster.

Do I need to grease the pan if I use a parchment sling?

A light greasing under the parchment holds the strips flat while you pour, and a little on the two uncovered walls stops sticking there. The sling does the real work: after the 2 hour cool the whole slab lifts out and nothing needs prying.

How do I cut brownies into bite-size pieces for a dessert tray?

Chill the slab about an hour after the 2 hour cool, then mark 1 in (2.5 cm) on all four sides of an 8 in (20 cm) slab for 64 pieces. Press each line, wipe every pass, and separate the pieces with the blade flat; bites dry quickly, so cut the day you serve.

Can I mark the grid on the crust with a toothpick instead of the blade?

Yes. A toothpick pressed at each 2 in (5 cm) ruler mark leaves a dot the blade can line up on, and it does not crack the crust. Mark all four sides, then connect opposite dots with one press of the blade; the dots vanish under the cut.

Why do my brownies stick to the blade even when cold?

Cocoa butter on steel. Wipe with a damp then dry cloth after every press, and do not stack cuts; a blade carrying the last line's fudge smears the next square. A cold slab plus a clean 6.3 in (16 cm) edge should leave almost nothing on the steel.

Should I cut brownies before or after frosting?

After the frosting sets, and with a chilled slab. Frost the whole slab, refrigerate about an hour, then mark and press the 2 in (5 cm) grid with a wiped blade so the frosting edge stays crisp. Cutting before frosting leaves 16 pieces to frost separately.