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Blueberry Bliss Oat Crumble Bars

Buttery oat crumble bars layered with juicy blueberry filling and a golden crunchy topping, perfect for dessert or breakfast.
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Prep Time 15 minutes
Cook Time 35 minutes
Total Time 50 minutes
Servings: 12 bars
Course: Desserts
Cuisine: American
Ingredients Equipment Method Notes

Ingredients
  

Crust & Crumble Base
  • 2 cups rolled oats
  • 1.5 cups all-purpose flour
  • 1 cup brown sugar packed
  • 1 tsp baking powder
  • 0.5 tsp salt
  • 0.75 cup unsalted butter melted
  • 1 egg
  • 2 tsp vanilla extract
Blueberry Filling
  • 2.5 cups blueberries fresh or frozen
  • 0.33 cup granulated sugar
  • 1 tbsp lemon juice
  • 2 tsp cornstarch

Equipment

  • Mixing bowl
  • baking pan (8x8 inch)
  • Spatula

Method
 

  1. Preheat oven to 350°F (175°C) and line an 8x8 baking pan with parchment paper.
  2. Mix oats, flour, brown sugar, baking powder, and salt in a bowl.
  3. Add melted butter, egg, and vanilla; mix into a crumbly dough.
  4. Combine blueberries, sugar, lemon juice, and cornstarch in a separate bowl.
  5. Press 2/3 of the mixture into the pan, layer with blueberries, and top with remaining crumble.
  6. Bake 32–38 minutes until golden and bubbling, then cool completely before slicing.

Notes

Cool completely before slicing for clean layers. Frozen blueberries can be used without thawing.