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Blueberry Oatmeal Bars

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These Blueberry Oatmeal Bars are a delicious, easy-to-make treat that combines buttery oats, juicy blueberries, and refreshing lemon zest. They’re the perfect balance of sweet and tart, making them ideal for breakfast, snacks, or dessert. With a simple crust and crumble topping, they’re versatile and easy to customize. Enjoy them fresh, or store for later—it’s the perfect treat for any occasion!

Ingredients

  • Crust and Crumble:
  • 1 cup all-purpose flour
  • 1 ½ cups rolled oats
  • ⅔ cup granulated sugar
  • ⅔ cup (150 g) melted unsalted butter
  • Blueberry Filling:
  • 2 cups blueberries (fresh or frozen)
  • ¼ cup granulated sugar
  • 2 tsp cornstarch
  • 1 Tbsp lemon juice
  • 1 ½ tsp lemon zest

Instructions

  • Preheat the Oven: Preheat your oven to 350°F (177°C). Line an 8-inch square baking pan with parchment paper.
  • Prepare the Oat Crust and Topping: In a large bowl, mix together the flour, oats, and sugar. Stir in the melted butter until everything is well combined. Reserve about ⅓ of the mixture for the topping, and press the remaining mixture into the bottom of the prepared pan to form the crust.
  • Prepare the Blueberry Filling: In a medium bowl, combine the blueberries, sugar, cornstarch, lemon juice, and lemon zest. Stir until the blueberries are evenly coated, then spread the mixture evenly over the crust.
  • Add the Topping: Sprinkle the reserved oat mixture over the blueberry filling, gently pressing it into the berries to form the crumble topping.
  • Bake the Bars: Bake for 38–40 minutes, or until the topping is golden brown and the filling is bubbly.
  • Cool and Slice: Let the bars cool completely in the pan before cutting into 16 squares.

Notes

  • If using frozen blueberries, there’s no need to thaw them.
  • For a gluten-free version, swap out the flour and oats with gluten-free alternatives.
  • To make dairy-free, replace the butter with coconut oil.
  • Storage: Store in an airtight container in the fridge for up to 1 week. They can also be frozen for up to 3 months. To reheat, microwave for 10–15 seconds.