Tulo

Apple Crumble with Oats Recipe

Tossing the sliced apples with a little flour and lemon juice thickens the juices as they bake so the filling turns syrupy instead of watery, while a topping built from cold butter rubbed into oats, flour, and brown sugar bakes into craggy, buttery clusters rather than a flat, cakey layer.

Prep
20 min
Cook
45 min
Total
65 min
Servings
8

Ingredients

Servings8
  • 6 medium apples (a mix of tart and sweet, like Granny Smith and Honeycrisp), peeled and sliced 1/4-inch thick
  • 1/4 cup granulated sugar
  • 1/3 cup all-purpose flour, divided
  • 1 tablespoon lemon juice
  • 1 teaspoon ground cinnamon
  • 1 cup old-fashioned rolled oats
  • 1/2 cup light brown sugar, packed
  • 1/2 cup unsalted butter, cold, cubed
  • 1/4 teaspoon salt

Nutrition per serving

Calories
233
Protein
3g
Carbs
44g
Fat
6g

Based on the recipe as written, one serving. Recalculates if you swap an ingredient above. An estimate only, exact values depend on the specific ingredients used.

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Instructions

  1. 1Preheat the oven to 350°F (175°C) and butter a 9x9-inch baking dish.
  2. 2In a large bowl, toss the sliced apples with the granulated sugar, 2 tablespoons of the flour, lemon juice, and cinnamon until evenly coated. Spread into the prepared baking dish.
  3. 3In the same bowl, combine the oats, remaining flour, brown sugar, and salt. Add the cold cubed butter and rub it into the dry ingredients with your fingers until the mixture looks like coarse, clumpy crumbs with some pea-sized pieces of butter still visible.
  4. 4Scatter the oat topping evenly over the apples, breaking up any large clumps but leaving smaller clusters intact.
  5. 5Bake for 40-45 minutes, until the topping is deep golden brown and the filling is bubbling visibly around the edges.
  6. 6Let the crumble rest for at least 15 minutes before serving so the filling can thicken slightly.

Tips & variations

  • Mix apple varieties: a firm tart apple like Granny Smith holds its shape while a sweeter one like Honeycrisp or Fuji breaks down slightly and adds natural sweetness.
  • Add 1/2 cup chopped pecans or walnuts to the oat topping for extra crunch.
  • A pinch of nutmeg or a splash of vanilla extract in the filling deepens the flavor without changing the texture.
  • If the topping browns too quickly before the filling is bubbling, tent the dish loosely with foil for the remaining bake time.

Storage & reheating

Cover and refrigerate leftover crumble for up to 4 days. Reheat individual portions in the microwave for 30-45 seconds, or warm the whole dish, uncovered, in a 325°F (165°C) oven for about 15 minutes to re-crisp the topping. Unbaked, assembled crumble can also be frozen (topping and filling both, unbaked) for up to 3 months; bake straight from frozen, adding about 15 extra minutes.

Tips from the Tulo kitchen

  • Slice the apples to a consistent 1/4-inch thickness so they all cook through at the same rate; thicker slices near the center can stay firm while thin ones at the edges turn mushy.
  • Chilling the crumb topping in the freezer for 10 minutes before baking helps it hold its clumpy shape longer in the oven.

FAQ

Do I need to peel the apples?

Peeling is recommended since the skins can turn tough and chewy after baking, but if using thin-skinned varieties like Honeycrisp, leaving some skin on is fine for texture.

Why is my apple crumble watery?

This usually means the apples released more juice than the flour could thicken, either from skipping the flour in the filling or using very juicy apple varieties; adding an extra tablespoon of flour or a teaspoon of cornstarch to the filling fixes it.

Can I make this gluten-free?

Yes. Use a 1:1 gluten-free flour blend in place of the all-purpose flour and confirm the oats are labeled certified gluten-free, since standard oats are often cross-contaminated with wheat.

Can I use quick oats instead of old-fashioned rolled oats?

Quick oats will work but produce a finer, softer topping; old-fashioned rolled oats hold their shape better and give the crumble more texture contrast.