Triple Berry Crumble Bars

Nothing says summer quite like a berry-filled dessert. These easy crumble bars are perfect for an easy summer snack or dessert.

A buttery oat crumble layered with a homemade berry filling.

Yield: 12–16 bars
Pan: 9 × 13-inch glass baking dish
Bake: 350°F for 35–40 minutes

Ingredients

Crumble

  • 1½ cups quick oats
  • 1½ cups all-purpose flour
  • 1 cup packed brown sugar
  • 1 cup butter, melted
  • 1½ teaspoons cinnamon
  • 1 teaspoon vanilla extract
  • ½ teaspoon baking powder
  • ½ teaspoon sea salt

Berry Filling

  • 3 cups mixed berries (fresh or frozen, thawed if frozen)
  • Juice of ½ lemon
  • 1 teaspoon cornstarch
  • 3 tablespoons sugar (more if berries are tart)

Instructions

  1. Preheat oven to 350°F. Lightly grease a 9 × 13-inch glass baking dish.
  2. In a large bowl, combine the oats, flour, brown sugar, cinnamon, baking powder, and salt. Stir in the melted butter and vanilla until crumbly.
  3. Press half of the crumble mixture firmly into the bottom of the prepared baking dish to form the crust.
  4. In a medium saucepan, combine the berries, lemon juice, cornstarch, and sugar. Cook over medium heat, stirring often, until the berries soften and the mixture thickens, about 5–8 minutes.
  5. Spread the warm berry filling evenly over the pressed oat crust.
  6. Sprinkle the remaining crumble mixture evenly over the berry layer.
  7. Bake for 35–40 minutes, or until the top is lightly golden and the filling is bubbling around the edges.
  8. Allow to cool completely before cutting into bars. For the cleanest slices, chill for 1–2 hours after cooling.

Storage

Store covered at room temperature for up to 2 days or refrigerate for up to 5 days. These bars also freeze beautifully for up to 3 months.


Baker’s Tip: Try a combination of strawberries, blueberries, raspberries, and blackberries. A scoop of vanilla ice cream or a dollop of whipped cream makes these extra special!