Mixed Berry Crumble Bars
These Mixed Berry Crumble Bars are buttery, fruity, and perfectly crumbly with a juicy berry filling that slices clean every time. Easier than pie and made with simple pantry ingredients, this mixed berry crumble bars recipe works beautifully with fresh or frozen berries and is perfect for sharing, storing, and stress-free baking any time of year.
Ingredients
- Crumble Base & Topping
- 3 cups all-purpose flour spooned and leveled
- ¾ cup granulated sugar
- ¾ cup brown sugar
- 1 teaspoon baking powder
- ½ teaspoon salt
- 1 cup 2 sticks cold unsalted butter, cubed
- Berry Filling
- 4 cups mixed berries blueberries, raspberries, strawberries; fresh or frozen, do not thaw
- 3 tablespoons cornstarch
- 1 tablespoon lemon juice
- 1 teaspoon vanilla extract
Instructions
- Preheat oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper, leaving an overhang. Lightly grease.
- In a large bowl, whisk together flour, granulated sugar, brown sugar, baking powder, and salt.
- Cut in cold butter using a pastry cutter or fingers until crumbly.
- Reserve 1½ cups of the mixture for the topping.
- Press the remaining mixture firmly into the bottom of the prepared pan to form the base.
- In another bowl, mix berries, cornstarch, lemon juice, and vanilla.
- Spread berry mixture evenly over the base.
- Sprinkle reserved crumble evenly on top.
- Bake for 40–45 minutes, until the topping is lightly golden and the filling is bubbling.
- Cool completely (at least 1 hour) before slicing.
Notes
- Cooling fully is essential for clean slices.
- Do not thaw frozen berries—they release too much liquid.
- If the top browns too quickly, loosely cover with foil near the end.