Description
Buttery mixed berry crumb bars with a tender oat crust, a jammy berry filling, and a golden crumble topping. Easy to slice, easy to share, and packed with bright fruity flavor.
Ingredients
Scale
- 1 1/2 cups all-purpose flour
- 1 cup old-fashioned rolled oats
- 3/4 cup light brown sugar, packed
- 1/2 cup granulated sugar, divided
- 1 teaspoon baking powder
- 1/4 teaspoon salt
- 3/4 cup unsalted butter, cold and cubed
- 1 large egg
- 1 cup blueberries, fresh or frozen
- 1 cup raspberries, fresh or frozen
- 1 cup blackberries, halved if large
- 1 cup strawberries, hulled and diced
- 2 tablespoons cornstarch
- 1 tablespoon lemon juice
- 1 teaspoon lemon zest
Instructions
- Preheat the oven to 350°F and line an 8×8-inch baking pan with parchment paper.
- In a large bowl, whisk together the flour, oats, brown sugar, 1/4 cup of the granulated sugar, baking powder, and salt.
- Cut in the cold butter until the mixture is crumbly, then mix in the egg until the crumbs begin to hold together when pressed.
- Press about two-thirds of the crumb mixture firmly into the bottom of the prepared pan to form the crust.
- In a medium bowl, gently toss the blueberries, raspberries, blackberries, strawberries, remaining 1/4 cup granulated sugar, cornstarch, lemon juice, and lemon zest.
- Spoon the berry mixture evenly over the crust.
- Sprinkle the remaining crumb mixture over the top.
- Bake for 42 to 48 minutes, until the topping is lightly golden and the berry filling is bubbling around the edges.
- Cool completely in the pan, then chill for at least 1 hour before lifting out and slicing into 12 bars.
Notes
- Use frozen berries straight from the freezer, do not thaw first.
- Let the bars cool fully before slicing for the cleanest shape.
- Store in an airtight container in the refrigerator for up to 5 days.
- Freeze individual bars for up to 2 months and thaw before serving.
Nutrition
- Serving Size: 1 bar
- Calories: 265
- Sugar: 18g
- Sodium: 85mg
- Fat: 11g
- Saturated Fat: 6g
- Unsaturated Fat: 4g
- Trans Fat: 0g
- Carbohydrates: 39g
- Fiber: 3g
- Protein: 3g
- Cholesterol: 33mg
Keywords: berry bars, mixed berry crumb bars, berry dessert bars, oat crumble bars, fruit bars