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serving dish of blackberry crumble with vanilla ice cream

Blackberry Crumble

Sweet plump blackberries combine with a blend of lemon zest and cinnamon in this easy dessert. There is an extra-large portion of crunchy crumble topping for all the streusel lovers.  This easy dessert has all the goodness of a blackberry pie without the bother of rolling a pastry crust.
4.78 from 18 votes
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Prep Time: 10 minutes
Cook Time: 1 hour
Total Time: 1 hour 10 minutes
Servings: 8 servings
Calories: 500kcal
Author: Dahn Boquist

Ingredients

Filling:

  • 3/4 cups granulated sugar
  • 4 to 6 tablespoons cornstarch see notes
  • 1/3 teaspoons ground cinnamon
  • Lemon zest from 1 lemon
  • 3 pounds fresh blackberries about 6 cups

Crumble topping:

  • 2 cups all-purpose flour
  • 1 cup packed brown sugar
  • 1/2 teaspoon ground cinnamon
  • 1/2 teaspoon salt
  • 10 tablespoons butter melted

Instructions

  • Pre-heat the oven to 350°F. Grease a 8x8 inch baking dish.
  • Combine the sugar, cornstarch, cinnamon and lemon zest in a small dish until all the dry ingredients are blended well. Gently toss the sugar mixture with the berries then place in the baking dish.

Crumble topping:

  • Combine the flour, brown sugar, cinnamon, salt, and butter. Stir with a fork until it has clumps the size of peas. Sprinkle evenly over the berries
  • Place the dish on a rimmed baking sheet (in case the juices bubble over the edge). Bake for about 55 to 60 minutes until the top is golden brown and the juices are bubbly. 
  • Let the berries cool slightly and serve with ice cream or sweetened whipped cream. 

Notes

  • The amount of cornstarch you use will depend on how ripe and juicy the blackberries are. If you have really ripe juicy blackberries, then use 6 tablespoons but if your blackberries are not super juicy or soft then use 4 tablespoons.
  • If you use frozen blackberries, use 5 to 6 tablespoons of cornstarch. 
  • Freezing the blackberry crumble: If you want to freeze the crumble, substitute the cornstarch for 4 tablespoons of instant clearjel, or 5 tablespoons of instant tapioca (cornstarch breaks down when it gets frozen so it doesn't work well for frozen pies and crumbles).

Nutrition

Serving: 1 | Calories: 500kcal | Carbohydrates: 88g | Protein: 6g | Fat: 16g | Saturated Fat: 9g | Polyunsaturated Fat: 5g | Trans Fat: 1g | Cholesterol: 38mg | Sodium: 256mg | Fiber: 10g | Sugar: 50g