Blueberry Oat Breakfast Bars (Printable)

Chewy bars blending fresh blueberries with hearty oats for a nutritious start or on-the-go treat.

# What You'll Need:

→ Dry Ingredients

01 - 2 cups old-fashioned rolled oats
02 - 1 cup whole wheat flour
03 - 1/2 cup light brown sugar, packed
04 - 1/2 teaspoon baking powder
05 - 1/4 teaspoon ground cinnamon
06 - 1/4 teaspoon salt

→ Wet Ingredients

07 - 1/2 cup unsalted butter, melted and cooled
08 - 1/4 cup plain Greek yogurt
09 - 1 large egg
10 - 1 teaspoon pure vanilla extract

→ Blueberry Mixture

11 - 2 cups fresh blueberries
12 - 2 tablespoons granulated sugar
13 - 1 tablespoon cornstarch
14 - 1 tablespoon lemon juice

# How To Make It:

01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, allowing overhang on sides for easy removal.
02 - In a large mixing bowl, combine rolled oats, whole wheat flour, brown sugar, baking powder, cinnamon, and salt. Mix thoroughly.
03 - In a separate bowl, whisk together melted butter, Greek yogurt, egg, and vanilla extract until smooth and well incorporated.
04 - Add wet ingredients to dry ingredients and mix until just combined. Reserve 1 cup of this oat mixture for topping.
05 - Press the remaining oat mixture evenly into the prepared pan to create a compact, even base layer.
06 - In another bowl, toss blueberries with granulated sugar, cornstarch, and lemon juice until evenly coated.
07 - Spread the blueberry mixture evenly over the oat base in a single layer.
08 - Crumble the reserved oat mixture evenly over the blueberries, distributing it across the entire surface.
09 - Bake for 30 to 35 minutes, until the top is golden brown and the filling is bubbling at the edges.
10 - Allow bars to cool completely in the pan. Using the parchment overhang, lift out the entire bar, then cut into 16 individual pieces.

# Expert Suggestions:

01 -
  • The texture is genuinely satisfying—chewy center, crispy-edged topping, and juicy berries that don't leak everywhere.
  • You can make a whole batch in under an hour and they keep for days, which means actual breakfast that doesn't require morning decisions.
  • They're naturally vegetarian and nut-free, so they work for almost any gathering without the allergen stress.
02 -
  • Don't skip draining frozen blueberries—excess water is the enemy of crispy topping and will make the filling puddle inside the bars.
  • The cornstarch is doing heavy lifting here; it's what separates these from becoming a soggy mess, so don't leave it out or reduce it.
03 -
  • Cool your melted butter completely before whisking it with the egg, or you'll end up with scrambled bits scattered through the dough.
  • If your blueberries release too much liquid before baking, drain them in a fine sieve over a bowl—save that juice for adding to yogurt or tea instead of letting it soak into the bars.
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