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A warm bowl of Apple Blackberry Crumble with golden oat topping and juicy baked fruit.
Daniel

Apple Blackberry Crumble

Juicy apples and tart blackberries bubble beneath a buttery oat topping for the ultimate rustic dessert.
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Prep Time 20 minutes
Cook Time 45 minutes
Total Time 1 hour 5 minutes
Servings: 8 servings
Course: Dessert
Cuisine: American
Calories: 320
Ingredients Equipment Method Notes

Ingredients
  

For the Filling
  • 2 lbs Granny Smith apples peeled, cored, and sliced 1/4-inch thick
  • 6 oz fresh blackberries about 1 1/4 cups
  • 1/3 cup granulated sugar
  • 1 tbsp lemon juice freshly squeezed
  • 1/2 tsp ground cinnamon
  • 1 tbsp cornstarch
For the Topping
  • 1 cup all-purpose flour
  • 3/4 cup old-fashioned rolled oats
  • 2/3 cup light brown sugar packed
  • 1/2 cup unsalted butter cold, cubed (1 stick)
  • 1/4 tsp kosher salt

Equipment

  • 9-inch baking dish
  • Large Mixing Bowl
  • Pastry cutter or fork

Method
 

Prep
  1. Preheat oven to 375°F. Lightly butter a 9-inch baking dish or coat with cooking spray.
  2. In a large bowl, toss sliced apples with blackberries, granulated sugar, lemon juice, cinnamon, and cornstarch until evenly coated. Let sit 5 minutes to draw out juices, then transfer to the prepared baking dish, spreading in an even layer.
  3. In the same bowl (no need to wash), combine flour, oats, brown sugar, and salt. Add cold butter cubes and cut in with a pastry cutter or fork until mixture resembles coarse crumbs with some pea-sized butter pieces remaining. Do not overwork - you want texture, not a paste.
  4. Scatter topping evenly over fruit, covering completely but not packing it down. Bake 40-45 minutes until topping is deep golden brown and fruit juices are bubbling vigorously around the edges. If topping browns too quickly, tent loosely with foil after 30 minutes.
  5. Cool on a wire rack at least 15 minutes before serving - this allows juices to thicken. Serve warm with vanilla ice cream or cold heavy cream.

Notes

For the best texture, use a mix of tart and sweet apples like Granny Smith and Honeycrisp. Frozen blackberries work in a pinch - do not thaw first or they will bleed excessively. The crumble can be assembled up to 4 hours ahead and refrigerated; add 5-10 minutes to baking time if starting cold.