Blueberry Muffin Bars

These blueberry muffin bars bring together the soft, fluffy texture of a classic blueberry muffin with the ease and sliceable convenience of a dessert bar. Packed with juicy blueberries in every bite, this recipe bakes up tender, lightly sweet, and perfectly moist, making it ideal for breakfast, brunch, or a simple homemade treat.

A buttery oat streusel topping adds irresistible crunch and warm cinnamon flavor, creating the perfect contrast to the soft interior. Whether you use fresh summer blueberries or frozen berries straight from the freezer, these bars are easy to prepare and perfect for feeding a crowd.

Prep Time: 15 minutes
Cook Time: 25 minutes
Cool Time: 20 minutes
Total Time: 1 hour
Servings: 20
Yield: 20 bars

Ingredients

Oat Streusel Topping

  • 3/4 cup rolled oats
  • 1/2 cup all-purpose flour
  • 1/2 cup packed brown sugar
  • 1 teaspoon ground cinnamon
  • 1/2 cup cold butter, cubed

Bars

  • 2 1/4 cups all-purpose flour
  • 1 tablespoon baking powder
  • 1 teaspoon baking soda
  • 1/2 teaspoon salt
  • 3/4 cup granulated sugar
  • 1/2 cup vegetable oil
  • 3/4 cup milk
  • 2 large eggs
  • 2 teaspoons vanilla extract
  • 2 cups fresh or frozen blueberries

Directions

  1. Preheat your oven to 350°F (175°C). Lightly grease a 10×15-inch baking pan with cooking spray and set aside.
  2. To make the streusel topping, combine rolled oats, flour, brown sugar, and cinnamon in a large bowl. Add the cold cubed butter and cut it into the mixture using a pastry blender or fork until crumbly. Set aside.
  3. In a medium bowl, whisk together the flour, baking powder, baking soda, and salt.
  4. In a separate large bowl, whisk the sugar and vegetable oil together until well blended. Add the milk, eggs, and vanilla extract and whisk until smooth.
  5. Add the dry flour mixture to the wet ingredients and stir just until combined. Avoid overmixing.
  6. Gently fold the blueberries into the batter so they are evenly distributed.
  7. Spread the batter evenly into the prepared baking pan.
  8. Sprinkle the oat streusel topping evenly over the batter.
  9. Bake for 25 to 28 minutes, or until a toothpick inserted into the center comes out clean.
  10. Allow the bars to cool in the pan on a wire rack for about 20 to 30 minutes before slicing into squares and serving.
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