Go Back
+ servings
Print Pin
5 from 4 votes

Blueberry Bars

These easy Blueberry Crumb Bars use the same mixture for the crust and topping and are filled with a delicious blueberry filling!
Course Dessert
Cuisine American
Keyword bar recipe, blueberry
Prep Time 15 minutes
Cook Time 50 minutes
Total Time 1 hour 5 minutes
Servings 9 larger bars or 16 smaller bars
Author Danielle


  • 1 cup (125 grams) all-purpose flour
  • 1/2 cup (50 grams) old-fashioned rolled oats
  • 1/2 cup (100 grams) brown sugar
  • 1/4 teaspoon salt
  • 1/2 cup (115 grams) cold unsalted butter
  • 2 cups (300 grams) fresh blueberries
  • 1/4 cup (50 grams) granulated sugar
  • 1 tablespoon (15 ml) fresh lemon juice
  • 2 teaspoons cornstarch


  • Preheat oven to 350°F. Line an 8-inch square baking pan with aluminum foil, making sure to leave some overhang for easy removal. Spray with nonstick cooking spray and set aside.
  • In a large mixing bowl, mix together the flour, oats, brown sugar, and salt until well combined. Cube the cold butter into small pieces and cut it into the mixture using a pastry cutter or fork (or your hands) until it resembles coarse crumbs. Remove 1 cup of the crumb mixture and set aside for the topping.
  • Scoop the remaining crumb mixture into the prepared baking pan and firmly press it down into one even layer.
  • In a large mixing bowl, add the blueberries, sugar, lemon juice, and cornstarch. Mix until everything is well combined. Scoop the blueberries out of the bowl and onto the prepared crust and spread them out into an even layer.
  • Sprinkle the reserved 1 cup of topping you set aside earlier on top of the blueberries.
  • Bake at 350°F for 40-50 minutes (mine usually takes closer to 50 minutes) or until the topping is lightly golden brown.
  • Remove from the oven and transfer to a wire rack to cool completely. Once cooled, remove the foil from the pan and slice into 9 larger bars or 16 smaller bars.


Storage instructions: Store bars in an airtight container in the refrigerator for up to three days.