Cozy Triple Berry Crumble Bars
These triple berry crumble bars feature a jammy mix of raspberries, blueberries, and blackberries with a buttery, nutty oat topping that delivers the perfect balance of chew and crunch. A simple, comforting dessert ideal for any occasion.
- Prep Time: 15 minutes
- Cook Time: 40 minutes
- Total Time: 55 minutes
- Yield: 12 servings 1x
- Category: Dessert
- Cuisine: American
Ingredients
Scale
- 1 1/2 cups (180g) all-purpose flour
- 1 1/2 cups (135g) old-fashioned rolled oats
- 1 cup (200g) packed light brown sugar
- 1/2 teaspoon ground cinnamon (optional)
- 1/4 teaspoon salt
- 12 tablespoons (170g) unsalted butter, melted and slightly cooled
- 3 cups (450g) mixed berries (raspberries, blueberries, blackberries; fresh or frozen)
- 1/2 cup (100g) granulated sugar
- 2 tablespoons (16g) cornstarch
- 1 teaspoon fresh lemon juice
- 1 teaspoon vanilla extract (optional)
Instructions
- Preheat oven to 350°F (175°C). Line a 9×13-inch baking pan with parchment paper or lightly grease it.
- In a large bowl, combine flour, rolled oats, brown sugar, cinnamon, and salt. Pour in melted butter and stir until mixture resembles coarse crumbs. Reserve about 1 1/2 cups for topping.
- Press remaining crumb mixture evenly into the bottom of the prepared pan. Bake for 10-12 minutes until lightly golden and fragrant.
- While crust bakes, whisk together granulated sugar, cornstarch, lemon juice, and vanilla extract in a medium bowl. Gently fold in mixed berries, ensuring even coating.
- Remove crust from oven and spread berry filling evenly over it.
- Sprinkle reserved oat topping evenly over the berries, leaving some gaps for juices to bubble through.
- Bake for 35-40 minutes until topping is golden brown and filling bubbles. Tent with foil if topping browns too quickly.
- Cool completely in the pan before cutting into bars to allow filling to thicken and ease slicing.
Notes
Use melted but cooled butter for best crumble texture. If topping feels too loose, add a tablespoon more flour or oats. Let bars cool completely before cutting to avoid crumbling. Use a serrated knife for clean slices. Frozen berries should be thawed and drained to prevent soggy crust. Tent with foil if topping browns too fast.
Nutrition
- Serving Size: 1 bar (1/12th of rec
- Calories: 280
- Sugar: 20
- Sodium: 110
- Fat: 12
- Saturated Fat: 7
- Carbohydrates: 39
- Fiber: 4
- Protein: 3
Keywords: triple berry crumble bars, oat topping dessert, easy berry bars, homemade berry dessert, crumble bars recipe