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Oatmeal Chocolate Chip Cookies

Chewy in the middle, crisp at the rim, with oats you can still see. The dough rests overnight and it matters.

Prep
20 min
Cook
12 min
Rest
12 hr
Makes
Makes 24 cookies
Jump to the recipe
Oatmeal cookies studded with chocolate chips, oats visible in the crumb
Photo: Angela Khebou / Pexels

Two decisions make this cookie, and neither is in the ingredient list. Neither applies to chocolate mayonnaise cake, which gets its texture from an emulsion instead.

The first is rolled oats, not instant. Instant oats are pre-cooked and rolled thinner; they dissolve into the dough and give a cookie that is uniformly cakey. Rolled oats stay whole, absorb moisture slowly, and give you something to chew against. You should be able to see them in the baked cookie.

The second is the overnight rest. Oats and flour need time to hydrate, and while they do, enzymes break some of the starch down into simpler sugars. Those sugars brown more readily, so a rested dough bakes darker, tastes more caramelized, and spreads less because the flour is no longer competing for water. A batch baked immediately against a batch rested twenty-four hours is not a subtle comparison — the rested one wins on every count. Twelve hours gets you most of the way.

The same overnight rest helps blueberry oatmeal bars, for the same reason.

Pull them at twelve minutes, when the centres still look underdone and slightly wet. They finish on the tray. A cookie baked until the middle looks done is a cookie that will be hard by the time it cools.

A jar of oats with an apple and a jug
Photo: Pezibear / Pixabay

Chewy oatmeal cookies: the recipe card

Chewy in the middle, crisp at the rim, with oats you can still see. The dough rests overnight and it matters.

Everything in one bowl

  • 1 cup (225 g) unsalted butter, softened
  • 1 cup (200 g) light brown sugar, packed
  • ½ cup (100 g) superfine sugar
  • 2 eggs, room temperature
  • 2 tsp vanilla extract
  • 1½ cups (190 g) all-purpose flour
  • 1 tsp baking soda
  • 1 tsp fine salt
  • 1 tsp ground cinnamon
  • 3 cups (270 g) rolled oats
  • 2 cups (340 g) dark chocolate chips
  • Flaky salt, to finish

Mixing, resting, baking

  1. 1 Beat the butter with both sugars for 3 minutes, until pale and visibly lighter in volume. This is aeration, not just mixing — it is what stops the cookie being dense.
  2. 2 Add the eggs one at a time, beating well after each, then the vanilla.
  3. 3 Whisk the flour, baking soda, salt and cinnamon together and fold in until barely combined. Stop while streaks of flour are still visible.
  4. 4 Fold in the oats and chocolate chips. The dough will be stiff.
  5. 5 Cover and refrigerate at least 12 hours, ideally 24. Do not skip this.
  6. 6 Heat the oven to 350°F (175°C) convection. Roll 55 g balls, space them well apart on lined trays, and bake 11–12 minutes — the edges set, the centres still pale and soft.
  7. 7 Scatter with flaky salt and leave on the tray 5 minutes before moving. They firm up as they cool.

Freezing the dough

  • The dough keeps 4 days refrigerated and freezes rolled into balls for 3 months. Bake from frozen, adding 2 minutes.
  • Rolled oats only. Instant oats give a cakey cookie with no chew; steel-cut oats stay hard and gritty.

Why chewy oatmeal cookies need a rest

You will get a decent cookie without it. You will get a noticeably better one with it — darker, deeper, chewier, less spread. Twelve hours captures most of the benefit.

Warm dough, warm trays, or both. Chill the dough properly and let trays cool completely between batches.