Ingredients
- 1 3/4 cups plus 1/3 cup all purpose flour
- 2 1/2 cups sugar
- 2 teaspoons ground cinnamon
- 1/2 teaspoon salt
- 14 tablespoons (1 3/4 sticks) chilled unsalted butter, cut into pieces
- 1 1-pound bag frozen blueberries, thawed, drained
- 1 1-pound bag frozen raspberries, thawed, drained
- 1 1-pound bag frozen blackberries, thawed, drained
- 1 teaspoon vanilla extract
Directions
- Preheat oven to 375°F. Butter and flour 13x9x2-inch glass baking dish. Blend 1 3/4 cups flour, 1 1/4 cups sugar, cinnamon, and salt in processor until just combined. Add butter; using on/off turns, cut in until moist clumps form. Press half of flour mixture onto bottom of pan.
- Mix all berries, vanilla, 1/3 cup flour, and 1 1/4 cups sugar in large bowl. Spoon over dough in pan. Sprinkle remaining flour mixture over. Bake until topping is brown and cooked through, about 50 minutes. Cool 15 minutes.
