Apple Crisp
Apple crisp is the fall dessert that gives you everything apple pie promises with a fraction of the work: tender, cinnamon-scented apples bubbling under a craggy brown-sugar oat topping. Tossing the fruit with cornstarch and lemon juice turns the juices into a glossy sauce instead of a watery puddle, and rubbing cold butter into the oat mixture bakes up shaggy, crunchy clusters rather than a dense crust. A mix of tart and sweet apples keeps every bite balanced.
Heat the oven to 175°C (350°F). Peel, core, and slice 1.1 kg (2 1/2 lb) of mixed tart and sweet apples 6 mm (1/4 inch) thick, then toss with 65 g (1/3 cup) granulated sugar, 1 tbsp each lemon juice and cornstarch, 1 tsp cinnamon, 1 tsp vanilla, and a pinch of salt; spread in a buttered 23 cm (9-inch) square dish. Rub 115 g (8 tbsp) cold cubed butter into 100 g (1 cup) rolled oats, 95 g (3/4 cup) flour, 110 g (1/2 cup) brown sugar, 1/2 tsp cinnamon, and 1/4 tsp salt until clumpy, scatter over the apples, and bake 40-45 minutes until the topping is deep golden and the juices bubble thickly at the edges. Rest 15 minutes before serving so the sauce sets.
- Use two apple varieties — one firm-tart (Granny Smith) and one sweet (Honeycrisp or Braeburn) — so the filling holds its shape and tastes balanced.
- Keep the butter cold and squeeze the topping into clumps with your fingers; those pebbles are what bake into a truly crisp, craggy crust.
- Do not pull it out at golden alone — wait until you see thick, syrupy bubbling at the edges, which means the cornstarch has fully activated.
Equipment
- 23 cm (9-inch) square baking dish or 2-quart baking dish
- Two mixing bowls
- Vegetable peeler
- Chef's knife and cutting board
- Kitchen scale or measuring cups and spoons
- Rimmed baking sheet (to catch drips)
Ingredients
Apple filling
- 1.1 kg apples, mixed tart and sweet (such as Granny Smith plus Honeycrisp), peeled, cored, sliced 6 mm / 1/4 inch thick
- 65 g granulated sugar
- 8 g cornstarch
- 15 ml fresh lemon juice
- 3 g ground cinnamon
- 5 ml vanilla extract
- 1.5 g fine salt
Oat crisp topping
- 100 g old-fashioned rolled oats, not instant
- 95 g all-purpose flour
- 110 g light brown sugar
- 1.5 g ground cinnamon
- 1.5 g fine salt
- 115 g cold unsalted butter, cut into 1 cm / 1/2-inch cubes, plus extra for the dish
Method
- STEP01
Set a rack in the middle of the oven and heat it to 175°C (350°F). Lightly butter a 23 cm (9-inch) square baking dish and set it on a rimmed baking sheet — the filling almost always bubbles over a little.
- STEP02
Peel and core the apples, then slice them about 6 mm (1/4 inch) thick. Slices this size soften fully in the bake time without collapsing into sauce; big chunks stay crunchy and thin shavings turn to mush.
- STEP03
In a large bowl, toss the apple slices with the granulated sugar, cornstarch, lemon juice, 1 tsp cinnamon, vanilla, and 1/4 tsp salt until every slice is evenly coated and no dry pockets of cornstarch remain. Scrape the apples and any juices into the prepared dish and press them into an even layer.
- STEP04
In the same bowl (no need to wash it), stir together the oats, flour, brown sugar, 1/2 tsp cinnamon, and 1/4 tsp salt. Add the cold butter cubes and rub them in with your fingertips or a pastry blender until the mixture looks like coarse, damp crumbs. Squeeze handfuls together and break them apart to create pebbly clumps ranging from pea- to marble-sized.
- STEP05
Scatter the topping evenly over the apples, leaving it craggy rather than pressing it flat. Bake for 40-45 minutes, until the topping is deep golden brown and the juices are bubbling thickly around the edges. If the topping is browning too fast in the last 10 minutes, tent it loosely with foil.
- STEP06
Let the crisp sit for at least 15 minutes on a wire rack. This pause lets the cornstarch-thickened juices settle from thin and runny into a spoonable, glossy sauce. Serve warm, ideally with something cold and creamy on top.
Make ahead
The topping is the best make-ahead piece: rub it together, then refrigerate for up to 3 days or freeze flat in a zip-top bag for up to 3 months (bake straight from frozen, adding a few minutes). You can also assemble the whole dish, cover, and refrigerate up to 24 hours before baking — the lemon juice and sugar keep the apples from browning noticeably; add about 5 extra minutes to the bake time from cold.
Storage
Cool completely, then cover and keep at room temperature for up to 1 day or refrigerate for up to 4 days. To bring back the crunch, re-warm uncovered in a 175°C (350°F) oven for 10-15 minutes; the microwave heats it fast but leaves the topping soft. Baked apple crisp also freezes well for up to 3 months — thaw overnight in the fridge, then re-crisp in the oven.
Variations
Gluten-free and vegan
Swap the all-purpose flour for an equal weight of a 1:1 gluten-free baking blend or almond flour, use certified gluten-free oats, and replace the butter with cold refined coconut oil or a solid plant-butter stick. The topping clumps slightly less with coconut oil, so chill it 15 minutes before scattering it over the fruit.
Maple-pecan crisp
Stir 60 g (1/2 cup) roughly chopped pecans into the topping and trade the granulated sugar in the filling for 60 ml (1/4 cup) pure maple syrup. The nuts toast as the crisp bakes and add a deeper crunch. Note this adds tree nuts for anyone tracking allergens.
Apple-cranberry
Replace 200 g (2 cups) of the apple slices with fresh or frozen cranberries and increase the granulated sugar to 100 g (1/2 cup). The berries burst into tart ruby pockets that cut through the sweet topping — a natural fit for a Thanksgiving table.
Serve with
Nutrition per serving
Nutrition values are estimates based on the metric measurements. Adjust as needed.
Frequently asked
What are the best apples for apple crisp?
Use a mix of one firm-tart variety and one sweet variety — Granny Smith with Honeycrisp, Braeburn, or Pink Lady is a reliable combination. The tart apples hold their shape and keep the filling from tasting flat, while the sweeter ones soften a bit more and round out the flavor. Avoid Red Delicious and McIntosh on their own; they break down into applesauce before the topping finishes browning.
What is the difference between an apple crisp and an apple crumble?
In American usage, an apple crisp has oats (and sometimes nuts) in the topping, which bake into crunchy clusters, while a crumble traditionally has a plainer flour-butter-sugar streusel. In the UK the word crumble covers both. The names get used interchangeably, but if the topping has rolled oats, you are looking at a crisp.
Why did my apple crisp turn out watery?
Three usual suspects: the thickener was skipped or under-measured, the crisp came out of the oven before the juices were visibly bubbling at the edges, or it was served straight from the oven. The cornstarch only thickens once the filling boils, so wait for thick, syrupy bubbles, then give it a full 15-minute rest — the sauce tightens dramatically as it cools slightly.
Can I use quick oats instead of old-fashioned oats?
You can in a pinch, but the texture suffers. Old-fashioned rolled oats stay distinct and toasty, giving the topping its signature crunch; quick oats are cut finer and absorb more moisture, so the topping bakes up softer and more uniform. Skip instant oatmeal packets entirely — they are pre-cooked and often sweetened.
Do I have to peel the apples for apple crisp?
Peeling is recommended but not mandatory. Skins left on stay slightly chewy and can separate from the softened flesh into papery ribbons, which some people mind and others do not. If you keep the peels for speed or extra fiber, choose thin-skinned varieties like Honeycrisp and slice the apples a touch thinner so they cook through evenly.
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