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A cast iron skillet with the baked crumble sits on a white surface surrounded by apples, blackberries, and oats.

Amazing Apple and Blackberry Crumble

Cassie Waltman
Apple and blackberry crumble has a vivid magenta fruit filling and a cinnamon-scented oat crumble topping studded with walnuts.
5 from 2 votes
Print Recipe Pin Recipe
Prep Time 20 minutes
Cook Time 35 minutes
Total Time 55 minutes
Course Dessert
Cuisine American
Servings 8
Calories 381 kcal

Ingredients
  

Apple and Blackberry Filling

  • 4 Granny Smith apples (peeled and diced, about 24 ounces)
  • 12 ounces blackberries
  • 1 tablespoon lemon juice
  • ¼ cup granulated sugar
  • ¼ teaspoon kosher salt
  • ½ teaspoon ground cinnamon
  • 1 teaspoon cornstarch

Crumble Topping

  • ½ cup salted butter
  • 1 cup walnuts (chopped)
  • ¾ cup old fashioned oats
  • ½ cup granulated sugar
  • ¼ cup all-purpose flour
  • 1½ teaspoon ground cinnamon

Instructions
 

  • Preheat the oven to 400°F. Grease a 10-inch cast iron skillet or a 4-quart casserole dish with butter or cooking spray.
  • Add the prepared apples, blackberries, lemon juice, sugar, salt, and cinnamon to a large bowl. Stir to coat the fruit evenly and let the mixture sit for 10 minutes to allow juices to accumulate.
  • Add the cornstarch to the fruit and stir to mix well. Transfer the fruit to the skillet or casserole dish and set aside.
  • While the fruit is releasing juices, prepare the crumble topping. In a medium bowl, microwave the butter until it is completely melted.
  • Add the walnuts, oats, sugar, flour, and cinnamon to the melted butter and stir to coat all of the dry ingredients with butter evenly.
  • Top the fruit with the crumble mixture in an even layer. Bake, uncovered, for 30-35 minutes until the fruit is bubbling and the top is golden.
  • Remove the crumble from the oven and allow it to cool for at least 15 minutes. Serve warm or at room temperature with ice cream or whipped cream.

Nutrition facts are sometimes provided below and are calculated using an online calculator. With specific brands of ingredients and additions, omissions, or substitutions the nutrition facts may change. We encourage you to use your own nutrition facts calculator to obtain the most accurate nutrition facts for your meal.

Nutrition Facts

Calories: 381kcalCarbohydrates: 46gProtein: 5gFat: 22gSaturated Fat: 8gPolyunsaturated Fat: 8gMonounsaturated Fat: 4gTrans Fat: 0.5gCholesterol: 31mgSodium: 166mgPotassium: 270mgFiber: 7gSugar: 31gVitamin A: 499IUVitamin C: 14mgCalcium: 45mgIron: 1mg
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