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.
Ingredients
- all-purpose flour: 2 Tbsp
- 9-inch pie crusts: 2 piece
- frozen mixed berries (blackberries, blueberries, and raspberries): 7 cups
- granulated sugar: 0.75 cup
- arrowroot powder: 0.33333 cup
- salt: 0.5 tsp
- rolled oats: 1 cup
- all-purpose flour: 1 cup
- packed light brown sugar: 0.75 cup
- apple pie spice: 1 tsp
- salt: 0.5 tsp
- unsalted butter: 7 Tbsp (cold)
Metric Conversion
Stages of cooking
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Preheat the oven to 375 degrees F (190 degrees C).
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Lightly dust an 11x15-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.
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Combine berries, sugar, arrowroot powder, and salt in a large bowl; stir well.
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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.
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Pour berry mixture evenly onto the crust and add crumble mixture on top.
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Bake in the preheated oven until brown and bubbly, 45 to 55 minutes. Remove and allow to cool for 30 to 45 minutes
