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Air Fryer Peanut Butter Cookies

Three ingredients, eight minutes, six cookies at a time. No flour and no oven to heat.

Prep
10 min
Cook
8 min
Makes
Makes 18 cookies
Jump to the recipe
Peanut butter cookies on a tray with a spoonful of peanut butter
Photo: Anton Uniqueton / Pexels

The three-ingredient peanut butter cookie is a real thing and it works because peanut butter is already most of a cookie dough. It supplies the fat that shortens the crumb, the protein that sets it, and enough ground-nut solids to hold a shape without flour. Sugar and egg do the rest.

It is worth knowing what each one is for, because there is nothing else in here to cover for a substitution. The fat coats what little protein structure there is and keeps the cookie short rather than chewy. The egg sets on heating and is the only thing holding the finished cookie together. The sugar is not just sweetness — it melts, spreads and then recrystallises as the cookie cools, and that is where the crisp edge comes from. Cut the sugar and you do not get a less sweet cookie; you get a soft, sandy one that never sets.

Use the stabilised supermarket kind, not natural peanut butter. Natural butter separates and the oil pools in the dough, giving greasy cookies that spread into one sheet. This is the one occasion when the processed version is genuinely correct.

Superfine sugar dissolves into the egg in the minute it takes to mix. Ordinary granulated works, but the crystals stay whole in a dough this stiff, and undissolved sugar means more spread and a faintly gritty edge. If granulated is what you have, let the mixed dough sit ten minutes before rolling.

Six at a time, and no more. The basket floor is the whole of your cooking surface, and these need air on every side to set before the undersides colour. A second batch costs eight minutes; a crowded first batch costs the whole tray.

Fork marks are structural, not decorative. The dough barely spreads on its own, so pressing it flattens the ball to a thickness that cooks through in eight minutes. Cross-hatched in both directions, the cookie has an even depth and cooks evenly across it.

Line the basket, and mind the fan. An air fryer moves air hard enough to lift a loose sheet of parchment into the heating element, which is a genuine fire risk and not a theoretical one. Cut the paper no larger than the basket floor and put the dough on it straight away so its weight holds it down.

These go pale-golden rather than deep brown, because the fan cooks them faster than the sugar can caramelise. Pull them while the centres still look soft and underdone. With no flour and no gluten there is nothing structural in a hot cookie, and they firm up completely as they cool. Trying to lift one at four minutes is how you end up with crumbs.

For a cookie with more structure and a longer rest, see oatmeal chocolate chip cookies; to assemble rather than bake, fruit pizza cookies use a flat sugar cookie as a base. For the opposite approach to sugar — rolled on the outside in crystals that stay crisp rather than dissolved into the dough — make cinnamon sugar cookies instead.

Piped peanut butter cookies cooling on a rack
Photo: Cats Coming / Pexels

Peanut butter cookies, printed

Three ingredients, eight minutes, six cookies at a time. No flour and no oven to heat.

Three things, plus salt

  • 1 cup (270 g) smooth peanut butter, not natural
  • 1 cup (200 g) superfine sugar
  • 1 large egg
  • 1 tsp vanilla extract, optional
  • ½ tsp fine salt
  • Flaky salt, to finish

Rolling, forking, air frying

  1. 1 Beat the peanut butter, sugar, egg, vanilla and salt together until it forms a stiff, uniform dough. It comes together in about a minute.
  2. 2 Roll into 30 g balls. Chill 10 minutes if the dough feels soft.
  3. 3 Line the air fryer basket with a piece of perforated baking paper. Space six balls on it — they need room and they are too fragile to lift off bare metal.
  4. 4 Flatten each one with a fork, then again at right angles, to about 1 cm thick.
  5. 5 Cook at 325°F (160°C) for 7–8 minutes, until set at the edges and still soft in the middle.
  6. 6 Leave them in the basket 5 minutes before moving. Hot, they will break; cool, they hold together perfectly.

Temperature, and add-ins

  • A lower temperature than most air fryer recipes on purpose: at 375°F (190°C) the outside is dark before the center sets.
  • Chocolate chips fold in well; add ¾ cup (100 g) at the end of mixing.
  • Crunchy peanut butter works and needs no other change. The pieces stay distinct.
  • Naturally flourless, so these suit a gluten-free table. The stabiliser in supermarket peanut butter is hydrogenated vegetable oil, not wheat, but read the label if coeliac disease is involved.
  • Rolled dough balls freeze for 3 months. Cook from frozen, adding 2 minutes. Baked cookies keep 5 days airtight.

Which peanut butter to use

Not without adjustment. Its oil separates and the cookies spread into a single greasy sheet. Stabilised peanut butter is the right choice here.

No — not in this recipe. With no flour, the sugar is doing structural work: it melts, spreads and recrystallises as the cookie cools, and that is what sets the edge. Halve it and you get a soft, sandy cookie that never firms up.

Almost always natural peanut butter, whose oil separates out. The other cause is a warm kitchen — if the dough feels tacky rather than stiff, chill it 10 minutes before rolling.

Yes, and it is easier to do a full batch at once. 350°F (175°C) on a lined sheet for 10–12 minutes. You get a little more browning than the air fryer gives, which is no bad thing.

Yes. These are too fragile to lift off bare metal while warm, and the perforations let air reach the undersides. Cut it to the basket floor and weight it with the dough immediately — loose paper can blow into the element.