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Crispy Triple Berry Crumble Bars with Oat Topping

crispy triple berry crumble bars - featured image

These crispy triple berry crumble bars feature a crunchy oat topping and a tangy berry filling, perfect for quick, homemade desserts that impress.

Ingredients

Scale
  • 2 cups (250g) all-purpose flour
  • 1 cup (90g) old-fashioned rolled oats
  • 3/4 cup (150g) packed brown sugar
  • 3/4 cup (170g) unsalted butter, cold and cubed
  • 1 tsp ground cinnamon
  • 1/4 tsp salt
  • 3 cups (450g) mixed berries (frozen blueberries, raspberries, blackberries)
  • 1/3 cup (65g) granulated sugar
  • 2 tbsp cornstarch
  • 1 tbsp lemon juice
  • 1 tsp vanilla extract

Instructions

  1. Preheat your oven to 350°F (175°C). Line a 9×13 inch (23×33 cm) baking pan with parchment paper, leaving some overhang for easy lifting later.
  2. In a large bowl, combine 2 cups (250g) all-purpose flour, 1 cup (90g) rolled oats, 3/4 cup (150g) packed brown sugar, 1 tsp cinnamon, and 1/4 tsp salt. Add the cold, cubed butter (3/4 cup / 170g).
  3. Cut the butter into the dry ingredients using a pastry cutter or your fingers until the mixture resembles coarse crumbs with some pea-sized pieces, about 3-5 minutes. Be careful not to overwork it.
  4. Press about two-thirds of the crumble mixture evenly into the bottom of the prepared pan. Use your fingers or the bottom of a glass to pack it down firmly, about 4-5 minutes.
  5. In a medium bowl, gently toss 3 cups (450g) mixed berries with 1/3 cup (65g) granulated sugar, 2 tbsp cornstarch, 1 tbsp lemon juice, and 1 tsp vanilla extract. Do not mash the berries.
  6. Spread the berry mixture evenly over the pressed crust in the pan.
  7. Sprinkle the remaining crumble mixture evenly over the berry layer without pressing it down.
  8. Bake for 40-45 minutes until the topping is golden brown and the berry filling is bubbling around the edges. Check after 35 minutes and tent with foil if topping browns too fast.
  9. Cool completely in the pan on a wire rack to allow the filling to set.
  10. Lift out the bars using the parchment paper overhang and cut into 12-16 bars depending on size preference.

Notes

Use cold butter to ensure a flaky, crispy topping. Do not overmix the crumble to avoid dense bars. Frozen berries can be used directly without thawing. Use parchment paper for easy removal. Let bars cool completely before cutting to prevent crumbling. Tent with foil if topping browns too quickly. For gluten-free, substitute flour with gluten-free blend; for dairy-free, use coconut oil or vegan butter.

Nutrition

Keywords: berry crumble bars, oat topping, triple berry dessert, easy berry bars, bake sale recipe, quick dessert, homemade bars