This informal pie is baked on a sheet pan and serves a crowd! Use frozen berries for a fresh flavor any time of year. You may serve this with whipped cream or ice cream, if desired.
Preparation Details
Prep Time: 15 mins
Cook Time: 45 mins
Total Time: 1 hr 30 mins
Servings: 18
Ingredients
- 2 tablespoons all-purpose flour
- 2 9-inch pie crusts
- 7 cups frozen mixed berries (blackberries, blueberries, and raspberries)
- ¾ cup granulated sugar
- ⅓ cup arrowroot powder
- ½ teaspoon salt
Steps
- Preheat the oven to 375 degrees F (190 degrees C).
- Lightly dust an 11×15-inch half-sheet pan with flour. Carefully place the 2 pie crusts into the bottom of the sheet pan, gently stretching and trimming the crusts to fit the bottom and up the sides of the pan.
- Combine berries, sugar, arrowroot powder, and salt in a large bowl; stir well.
- Combine oats, flour, brown sugar, apple pie spice, and salt in a medium bowl. Use a pastry knife to cut butter into the oat mixture until butter is evenly distributed throughout and the crumble topping mixture resembles small, uneven pieces.
- Pour berry mixture evenly onto the crust and add crumble mixture on top.
- Bake in the preheated oven until brown and bubbly, 45 to 55 minutes. Remove and allow to cool for 30 to 45 minutes
