Blueberry Oat Bars Recipe

Hey there, baking enthusiasts! Are you ready to elevate your snack game with a delicious and wholesome treat? Look no further because we’ve got just the recipe to satisfy your cravings: Blueberry Oat Bars. Imagine sinking your teeth into a soft and chewy oat base, topped with a layer of juicy blueberries and a crumbly oat streusel. It’s like a hug for your taste buds! So, let’s roll up our sleeves and dive into this mouthwatering recipe that will have you reaching for seconds.

Why Blueberry Oat Bars?

  • Perfectly Portable: Whether you’re on the go or enjoying a cozy afternoon at home, these bars are the perfect snack to have on hand.
  • Wholesome Ingredients: Packed with oats, fresh blueberries, and just the right amount of sweetness, these bars are a healthier alternative to store-bought snacks.
  • Simple and Versatile: With basic pantry staples and minimal prep time, you can whip up a batch of these bars in no time. Plus, you can customize them with your favorite add-ins like nuts or chocolate chips.
  • Kid-Friendly: Even the pickiest eaters won’t be able to resist these delicious bars. They’re great for lunchboxes, after-school snacks, or anytime munchies.

Ingredients You’ll Need:

For the Oat Base and Streusel:

  • 1 1/2 cups old-fashioned oats
  • 1 cup all-purpose flour
  • 1/2 cup brown sugar
  • 1/4 teaspoon baking powder
  • 1/4 teaspoon salt
  • 1/2 cup melted butter
  • 1 teaspoon vanilla extract

For the Blueberry Filling:

  • 2 cups fresh or frozen blueberries
  • 1/4 cup granulated sugar
  • 2 tablespoons lemon juice
  • 1 tablespoon cornstarch


  1. Preheat and Prep: Preheat your oven to 350°F (175°C) and line an 8×8-inch baking dish with parchment paper, leaving an overhang on the sides for easy removal.
  2. Make the Oat Base: In a large bowl, combine the oats, flour, brown sugar, baking powder, and salt. Stir in the melted butter and vanilla extract until the mixture resembles coarse crumbs.
  3. Press Into Pan: Press two-thirds of the oat mixture into the bottom of the prepared baking dish, pressing down firmly to create an even layer.
  4. Prepare the Blueberry Filling: In a medium saucepan, combine the blueberries, granulated sugar, lemon juice, and cornstarch. Cook over medium heat, stirring occasionally, until the mixture thickens and the blueberries burst, about 5-7 minutes. Remove from heat and let cool slightly.
  5. Layer the Blueberry Filling: Spread the blueberry filling evenly over the oat base in the baking dish.
  6. Add the Streusel: Sprinkle the remaining oat mixture evenly over the blueberry filling, creating a crumbly streusel topping.
  7. Bake: Bake in the preheated oven for 35-40 minutes, or until the top is golden brown and the blueberry filling is bubbly.
  8. Cool and Slice: Remove the baking dish from the oven and let the bars cool completely in the pan on a wire rack. Once cooled, use the parchment overhang to lift the bars out of the pan and onto a cutting board. Slice into squares and enjoy!

Tips for Success:

  • Use Fresh Blueberries: While frozen blueberries work too, fresh blueberries will give your bars a juicier and more vibrant flavor.
  • Don’t Overmix: Be careful not to overmix the oat mixture, as it can result in tough bars. Mix until just combined for a tender crumb.
  • Customize Your Bars: Feel free to add nuts, seeds, or a sprinkle of cinnamon to the oat mixture for added flavor and texture.


With their irresistible combination of chewy oats and juicy blueberries, these Blueberry Oat Bars are sure to become a favorite in your baking repertoire. Whether you enjoy them as a snack, dessert, or even breakfast on the go, these bars are a delicious and satisfying treat for any time of day. So, what are you waiting for? Get baking and indulge in a little slice of heaven!


Can I use frozen blueberries instead of fresh?

Yes, frozen blueberries can be used in this recipe. Just be sure to thaw and drain them before using to prevent excess moisture.

How should I store leftover bars?

Store any leftover bars in an airtight container at room temperature for up to 3 days, or in the refrigerator for up to a week.

Can I use quick oats instead of old-fashioned oats?

Yes, quick oats can be used in place of old-fashioned oats, but the texture of the bars may be slightly different.

Can I freeze these bars?

Absolutely! These bars freeze well. Once cooled, wrap individual bars tightly in plastic wrap and store them in a freezer-safe bag or container for up to 3 months.

Can I use a different type of fruit for the filling?

Definitely! Feel free to experiment with different fruits like raspberries, strawberries, or a combination of your favorites for a unique twist on these bars.

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