How to Slice Apples Thin for a Tart Without Losing a Fingertip

About 1/8 in (3 mm). Once Upon a Chef's rustic French apple tart uses that thickness and bakes at 350°F (175°C) for 55 to 65 minutes. Thinner than 1/16 in (1.5 mm) and the slices tear when you lift them; thicker than 1/4 in (6 mm) and they stay firm when the rest is soft.

Yes for a fanned tart. Peel first, then cut the cheeks off the core, because peel toughens in a 55 to 65 minute bake and a peeled cheek sits flatter on the board. Leave skins on only for a rustic galette where the slices are thicker, around 1/4 in (6 mm).

You can, with the guard that ships with the mandoline, at a 1/8 in (3 mm) setting. Wikipedia's mandoline entry warns the tool can cause serious injury if used incorrectly, and the Houseland steel finger guard is documented for knife work on a board only, not for a mandoline blade.

Three large apples, which yield about 4 cups of 1/8 in (3 mm) slices, is the quantity Once Upon a Chef gives for a rustic French apple tart. Buy fruit around 3 in (7.6 cm) across so the outer ring of the 9 in (23 cm) circle gets long slices without gaps.

The cheek shrinks, the guiding hand creeps forward, and you start cutting by feel instead of by the first slice. Match every slice to the edge of the first one and slow down once the cheek is under 2 in (5 cm) wide. A steel guard gives the knife a fixed face to ride, which holds the 1/8 in (3 mm) pace.

Yes. The split ring on the inner face of the Houseland guard is symmetrical and not shaped for a particular hand, so it wears on the left or the right without adjusting anything. That makes it easy to hand across when two people share the apple prep.

A few minutes in open air before the colour starts, because polyphenol oxidase works fastest at pH 5 to 7. Tossed in lemon juice, which drops the surface below pH 3 where the enzyme is inhibited, the slices hold their colour for the 10 to 15 minutes it takes to lay out a tart.

Yes, if they are tossed in lemon juice, about 1.5 tablespoons (22 mL) per three apples, and refrigerated in a sealed container at or below 40°F (4°C). They will be slightly softer and darker by morning, so cut them the same day when the fan is the point of the tart.

The single style is about 2.6 in (6.5 cm) wide with one ring for one finger; the double is about 3.0 in (7.6 cm) with two rings so the index and middle finger both sit behind the steel. Pick the double if your hand is large or you naturally guide with two fingers forward.

No rating is given, so hand wash it in warm soapy water and dry it straight after prep. Apple juice is acidic, and dried-on juice can mark stainless steel; a 10 second rinse while the tart goes into the oven is enough.

Not for a fine fan. Skin toughens over a 55 to 65 minute bake and stops a 1/8 in (3 mm) slice from bending flat against its neighbour. Keep the skin only on a galette with 1/4 in (6 mm) slices, where a little chew is part of the style.

A sharp 8 in (20 cm) chef's knife or a 6 to 7 in (15 to 18 cm) santoku. Length matters less than the edge; a dull blade skids off the wet cheek and forces a thicker cut. A paring knife is too short to draw a full 1/8 in (3 mm) slice across a 3 in (7.6 cm) cheek in one stroke.

A cheek has one flat face and no hole, so it sits still on the board and every slice is a solid crescent. A cored half rocks on its curved back and the slices carry a notch. Four cuts about 1/4 in (6 mm) outside the core give four cheeks in under 30 seconds.

About 1/4 in (6 mm) outside the seed cavity on each side. Closer and you hit the seeds and the woody carpel; further and you leave a 1/2 in (1.3 cm) of good apple on a core you are about to compost.

No. The knife rides down the guard's face rather than under it, so the slice is set by how far you move the guard back between cuts, not by the steel. Step it back about 1/8 in (3 mm) each stroke for tart slices.

Hold the first slice on edge next to a coin: a US penny is about 1/16 in (1.5 mm) thick, so two pennies stacked is your 1/8 in (3 mm) target. Cut one slice to match, then match every later slice to that first one.

Faster but not fanned. A 2 mm slicing disc gives slices thinner than 1/8 in (3 mm) that tear when lifted, and the feed tube forces the cheek to fall at random angles. Use it for a sauce layer under the fan, not the fan itself.

They are thinner than about 1/16 in (1.5 mm) or the apple is too soft. Lift each slice with the flat of the knife instead of your fingers, and use a firm variety such as Granny Smith, which holds a 1/8 in (3 mm) slice in one piece.

You can, but a serrated edge saws rather than slices, leaving ridged faces and a wider cut of about 3/16 in (5 mm) at best. A plain sharp edge gives a clean 1/8 in (3 mm) slice that fans flat.

One about 3 in (7.6 cm) across, which yields cheeks nearly 2.5 in (6.4 cm) wide. The outer circle of a 9 in (23 cm) tart needs those longer slices; keep smaller fruit for the centre where the circles tighten.

About half a slice, so each 1/8 in (3 mm) crescent covers 50 percent of the one before. That spacing leaves the tips exposed to caramelise and lets the fan shrink evenly during the 55 to 65 minute bake.

Outside in. Start the first circle at the 3 in (7.5 cm) border, work toward the centre, and finish with the shortest slices from the smallest apple in a tight middle rosette. The outer ring sets the pattern the eye reads first.

After. Sprinkle 2 to 3 tablespoons (25 to 40 g) of sugar over the laid fan, then brush with melted butter. Sugaring before fanning pulls juice out of the slices within 10 minutes and makes them slippery to place.

350°F (175°C) for 55 to 65 minutes, until the apple edges are tender and the pastry is golden, per Once Upon a Chef's rustic French tart. A hotter 400°F (205°C) oven browns the pastry before 1/8 in (3 mm) slices soften evenly.

The edges of the outer slices look translucent and a paring knife slides into the thickest one with no resistance, usually at 55 to 65 minutes at 350°F (175°C). If the pastry is browning ahead of the fruit, tent it with foil for the last 15 minutes.

Yes. A 1/4 in (6 mm) slice needs roughly 15 to 20 minutes more at 350°F (175°C) than a 1/8 in (3 mm) one, which is why mixed thicknesses in one tart give a fan that is mushy in places and firm in others.

Yes, about 1/2 teaspoon (1 g) mixed into the sugar for a three-apple tart. More than a teaspoon turns a French tart into a pie flavour and darkens the pale fan during the bake.

Soft dessert apples in the McIntosh style break down to pulp within 30 minutes at 350°F (175°C). Wikipedia's cooking-apple entry marks firm-fleshed varieties such as Braeburn and Belle de Boskoop as keeping their shape; those and Granny Smith hold a fan.

Yes, and Once Upon a Chef suggests it: two Granny Smith and one Honeycrisp give tartness plus sweetness. Slice all of them to the same 1/8 in (3 mm) so the varieties cook to the same softness in the same time.

Only with its own hand guard fitted and at a 1/8 in (3 mm) setting. Wikipedia's mandoline entry notes the tool can cause serious injury if used incorrectly, and a bare apple cheek gets slippery fast; stop when 1 in (2.5 cm) is left and finish with a knife.

No. The guard is documented for knife work on a board only, and nothing in our source covers mandoline or grater blades, which move differently against the steel. Use the guard that ships with the mandoline.

No. It carries no cut-resistance rating and is not rated safety equipment. It is a rigid stainless shield about 2.6 in (6.5 cm) across that guides the blade away from fingertips; rated cut-resistant gloves are a different product.

Slide one finger up into the split ring on the hollow inner face so the curved hood faces the knife and the smooth outer face is toward the blade. The hood is about 1.8 in (4.5 cm) tall in the single style, so the fingertip should sit fully behind it.

The middle finger for most cooks, because it is the one that leads the claw grip and sits furthest forward. The two-ring style at about 3.0 in (7.6 cm) wide holds the index and middle finger together for a wider guard face.

A guard reduces exposure but does not make a knife safe, and it has no cut-resistance rating. A child can wear the 2.6 in (6.5 cm) single-ring style to hold a cheek while an adult cuts, which keeps their fingertips behind steel without putting a blade in their hand.

Rinse in warm soapy water and dry with a towel within a few minutes of finishing. Apple juice is acidic, around pH 3 to 4, and left to dry it can leave marks on brushed stainless steel; no dishwasher rating is given, so keep it out of the machine.

It's stainless steel with a brushed finish — keep it dry rather than relying on the alloy. Hand wash after prep and dry it within a few minutes; stored wet in a drawer for days, any stainless can spot.

In the drawer with the paring knives, since it is only about 2.6 in (6.5 cm) by 1.8 in (4.5 cm) in the single style. A guard stored in a cupboard across the kitchen gets skipped on a 10 minute job like three apples.

About 8 to 12 minutes for a home cook working at 1/8 in (3 mm) behind a guard, including peeling and coring. Rushing to 5 minutes is where the last inch of each cheek gets cut by feel and the slices drift thicker.

The juice of half a lemon, roughly 1.5 tablespoons (22 mL), tossed through the slices in a wide bowl. Enough to coat every cut face; pooling juice in the bottom of the bowl is wasted and makes the slices wet on the pastry.

Yes, at the same 1.5 tablespoons (22 mL) per three apples. The anti-browning effect comes from citric and ascorbic acids dropping the surface below pH 3, and bottled juice carries both; it lacks only the fresh aroma, which the 55 minute bake removes anyway.

A mild solution, about 1/2 teaspoon (3 g) of salt in 1 cup (240 mL) of water, slows browning, but it leaves the slices wet and faintly salty. Lemon juice does the job without the water, so it suits a fan that must sit dry on pastry.

The juice was added too late or too little of it coated the faces. Polyphenol oxidase starts within minutes of cutting, so toss each cheek's slices as they come off the knife, not after all three apples, and use about 1.5 tablespoons (22 mL) per batch.

Water alone only slows browning slightly and leaves the slices wet, so they steam under the sugar instead of caramelising in the 350°F (175°C) oven. Use lemon juice in a bowl and keep the slices out of water.

Up to 2 hours before baking if the slices were tossed in lemon juice and the assembled tart sits covered in the refrigerator at or below 40°F (4°C). Longer and the acid and sugar pull juice that soaks the pastry base.

Yes, tossed in lemon juice and frozen flat on a tray, then bagged, for up to 3 months. Thawed slices are limp, so bake them from frozen directly on the pastry and add about 10 minutes to the 55 to 65 minute bake.

About 3 days at or below 40°F (4°C) in a sealed container after a lemon juice toss. They soften and darken a little each day, so use day-old slices for sauce or a crumble rather than a fanned tart.

The skin is fine to eat or compost. The seeds contain amygdalin, which releases cyanide when crushed, so the core with its 5 to 8 seeds goes in the compost, not the blender.

Grate them on the coarse side of a box grater, about 1/4 in (6 mm) holes, and spread the shreds under the fan as a thin layer. They cook to sauce in the same 55 to 65 minutes and hold the slices in place.

Yes, and that is the safer choice. Lay the stub on its widest face, rest the guard's hood on it, and slice down to a final piece about 1/4 in (6 mm) wide. Never trim a stub held in your palm.

The piece is now about the size of a slice, too small to pinch behind a knuckle, and the guiding hand drifts forward to steady it. A hood about 2.6 in (6.5 cm) across keeps fingertips behind steel through that drift.

Either, as long as it is dry and does not slide. A steel board is non-porous and wipes clean of acidic juice in seconds; wood grips the cheek a little better. Put a damp towel under either so the board holds still on the counter.

Around 24 slices at 1/8 in (3 mm) from four cheeks, plus four small stubs. A three-apple tart is therefore about 70 slices, which is why an even pace matters more than speed.

No. A rustic tart is fanned on a rolled pastry round about 12 in (30 cm) across, leaving a 3 in (7.5 cm) border that folds over the fruit. A 9 in (23 cm) fluted tin gives a neater edge but changes nothing about the slicing.

About 1/8 in (3 mm), the same as the apple slices. Thicker pastry stays pale in the middle after 55 to 65 minutes at 350°F (175°C) because the wet fruit insulates it from above.

Yes. Pears are softer, so use firm fruit, cut the cheeks off the core the same way, and slice at 3/16 in (5 mm) rather than 1/8 in (3 mm); a ripe pear slice thinner than that tears when lifted.

Yes. The two-ring style measures about 3.0 in (7.6 cm) by 2.2 in (5.6 cm) and holds the index and middle finger side by side, so a wide hand gets a guard face that covers both leading fingertips instead of one.

One guard in the style you select, single ring or double ring. The knife, board and fruit in the product photos are props, so plan on your own 8 in (20 cm) chef's knife and a board at least 12 in (30 cm) wide for the slices.

Yes, because the split ring is symmetrical and works on either hand. One cook slices the cheeks while the other peels, then the guard passes across in a couple of seconds with nothing to adjust.

Repetition and a fixed thickness reference, usually a mandoline at 1/8 in (3 mm) or a knife guided against knuckles held at one height. At home the steel guard gives the same fixed face without the years of practice.