Apple Crumble Recipe

A good apple crumble should have distinct fruit and topping layers: tender slices underneath and crisp clumps on top. Cornstarch captures the apple juices, while rubbing cold butter into the topping creates irregular pieces that stay crunchy instead of forming a sandy blanket.

Oven calibration, pan material, fruit moisture and ingredient measuring can shift the finish. Begin checking at the early end of the range and use the center cues described below.

This recipe was developed through culinary research and editorial review. It is not represented as a personal kitchen test.

For a related idea, see apple muffins healthy. You may also want apple cinnamon oatmeal overnight.

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Why this recipe works

Cornstarch is dispersed first: Coating the slices before they enter the dish prevents gummy pockets and captures juice as the apples soften.

Cold butter makes clumps: Small cold pieces melt gradually, leaving crisp ridges and tender pockets rather than a uniformly greasy topping.

Center bubbling is the cue: Bubbles at the center show that the thickener has heated fully; edge bubbling alone can leave a runny middle.

The first batch is the useful reference point. Measure as written, note the finish in your equipment, and change only one variable at a time if an adjustment is needed.

Ingredients

• 6 cups peeled sliced apples, about 2 pounds; 1/4-inch slices
• 1/3 cup granulated sugar, adjust slightly for very sweet apples
• 1 1/2 tablespoons cornstarch
• 1 tablespoon lemon juice
• 1 teaspoon ground cinnamon, divided
• 3/4 cup all-purpose flour, 90 grams
• 3/4 cup old-fashioned rolled oats, 68 grams
• 1/2 cup packed light brown sugar, 100 grams
• 1/4 teaspoon fine salt
• 6 tablespoons cold unsalted butter, cut into small cubes

Ingredient notes

Apples

A mix of tart firm apples and sweeter aromatic apples gives balanced flavor. Avoid only very soft varieties, which can collapse into sauce.

Rolled oats

Old-fashioned oats keep their shape. Quick oats make a finer, softer topping, and steel-cut oats will not soften properly here.

Butter

Keep it cold until mixing. If the kitchen is warm and the topping feels greasy, chill it for 10 minutes before assembling.

How to make apple crumble

1. Prepare

Heat the oven to 375°F. Lightly butter an 8-inch square dish and set it on a rimmed sheet pan.

2. Season the apples

Toss apples with granulated sugar, cornstarch, lemon juice and 1/2 teaspoon cinnamon until no dry starch remains.

3. Make the crumble

Mix flour, oats, brown sugar, salt and the remaining cinnamon. Rub in cold butter until the mixture holds together in pea- to walnut-size clumps.

4. Assemble

Spread the apples evenly, including any juice in the bowl. Scatter the crumble loosely over the top without pressing it flat.

5. Bake

Bake 40 to 50 minutes, until the topping is golden and the filling bubbles slowly near the center, not just at the edges.

6. Cool

Cool at least 20 minutes before serving so the apple juices thicken around the fruit.

Quick timing and doneness guide

Stage	What to look for	What to do
Preparation	Coating the slices before they enter the dish prevents gummy pockets and captures juice as the apples soften.	Complete the size, moisture or equipment setup before cooking
First check	Spread the apples evenly, including any juice in the bowl. Scatter the crumble loosely over the top without pressing it flat.	Check at the early end of the range and keep unfinished portions cooking
Finished	Cool at least 20 minutes before serving so the apple juices thicken around the fruit.	Stop when the stated texture or safe temperature is reached
If adjustment is needed	Cut firm apples about 1/4 inch thick and begin checking at 40 minutes.	Make the smallest useful change, then check again

This table is a decision guide, not a replacement for ingredient labels, the appliance manual or safe-temperature guidance. When food safety depends on internal temperature, check more than one thick piece with a reliable thermometer.

Substitutions and variations

Nutty topping

Replace 1/4 cup oats with 1/3 cup chopped pecans or walnuts.

Gluten-free

Use a dependable 1-to-1 gluten-free flour and certified gluten-free rolled oats; the topping may brown a little differently.

Pear and apple

Replace up to half the apples with firm-ripe pears and keep the same total volume.

Change one major component at a time. Moisture, sweetness, structure and cooking time affect one another, so several simultaneous substitutions are harder to predict.

Serving ideas

Serve warm rather than piping hot, plain or with vanilla ice cream, lightly whipped cream or thick yogurt. The 20-minute rest makes the filling easier to spoon and keeps the topping from immediately dissolving into the juice.

Troubleshooting

The filling is watery

Likely cause: The crumble was served immediately or the center never bubbled.

Fix: Bake until slow bubbles appear near the center, then cool at least 20 minutes.

The topping is pale

Likely cause: The dish was covered, crowded low in the oven or removed before the butter and sugar browned.

Fix: Bake uncovered in the middle or upper-middle rack until golden.

The topping is dusty

Likely cause: The butter was not worked in enough.

Fix: Squeeze handfuls until clumps form, then break those clumps over the apples.

The apples are mushy

Likely cause: The slices were thin or made from a soft sauce apple.

Fix: Cut firm apples about 1/4 inch thick and begin checking at 40 minutes.

Storage, freezing and reheating

Refrigerator: Cover and refrigerate for up to 4 days after the crumble has cooled.

Freezer: Freeze baked, cooled crumble for up to 2 months. Thaw overnight in the refrigerator.

Reheating or serving after storage: Warm uncovered at 350°F for 15 to 20 minutes. The microwave is faster but softens the topping.

For general handling, the FoodSafety.gov Four Steps to Food Safety is the authoritative outside reference used for this article. FoodSafety.gov recommends keeping work surfaces and utensils clean and refrigerating perishable foods promptly; those general practices also apply when preparing and storing this dessert.

Frequently asked questions

Should I peel the apples?

Peeling gives the most uniform filling. Thin tender skins can remain if you prefer more texture.

Can I assemble apple crumble ahead?

Prepare the filling and topping separately, refrigerate both, then assemble just before baking so the topping stays dry.

What is the difference between a crumble and a crisp?

Usage varies, especially by region. In the United States, a crisp usually contains oats; this recipe uses an oat crumble topping and works under either familiar name.

Recipe development note

The method for apple crumble recipe was developed through culinary research and editorial review. The quantities and time ranges are an editorial recipe specification, not a claim that every ingredient brand, appliance or batch was personally tested in one kitchen.

Nutrition is an estimate per servings and varies with brands, optional ingredients and portion size. The accompanying visuals are AI-assisted food-editorial images, not photographs of a kitchen test.

Printable recipe card

This recipe was developed through culinary research and editorial review. Equipment, ingredient brands, starting temperature and batch size can change timing; follow the method cues and applicable safety guidance.

Nutrition is an estimate per servings and varies with brands, optional ingredients and portion size.