Blueberry Oat Breakfast Bars (Printable)

Soft bars packed with blueberries and oats, ideal for a wholesome, portable breakfast or snack.

# 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, or frozen, thawed and drained
12 - 2 tablespoons granulated sugar
13 - 1 tablespoon cornstarch
14 - 1 tablespoon lemon juice

# Step-by-step Directions:

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 oats, whole wheat flour, brown sugar, baking powder, cinnamon, and salt.
03 - In a separate bowl, whisk together melted butter, Greek yogurt, egg, and vanilla extract until smooth.
04 - Add wet ingredients to dry ingredients and mix until just combined. Reserve 1 cup of this mixture for topping.
05 - Press remaining oat mixture evenly into the prepared pan to form a compact base layer.
06 - In a bowl, toss blueberries with granulated sugar, cornstarch, and lemon juice until evenly coated.
07 - Spread blueberry mixture evenly over the oat base.
08 - Crumble reserved oat mixture evenly over the blueberries, distributing across the entire surface.
09 - Bake for 30 to 35 minutes, or until the top is golden brown and the blueberry filling is bubbling at edges.
10 - Allow bars to cool completely in the pan. Lift out using parchment overhang, cut into 16 bars, and wrap individually as desired.

# Expert Advice:

01 -
  • They taste indulgent but feel genuinely wholesome, with real oats and Greek yogurt doing the heavy lifting.
  • One batch makes sixteen bars, which means you're basically meal prepping without it feeling like a chore.
  • The blueberries stay juicy and don't sink to the bottom like they do in so many other recipes.
02 -
  • Don't skip draining frozen blueberries, even if they seem dry; they release moisture as they thaw, and excess liquid is the enemy of texture.
  • The cooling step really matters—cutting into warm bars will result in crumbles, but a fully cooled batch will hold its shape with integrity.
  • If your top is browning too fast, loosely tent the pan with foil during the last 10 minutes of baking.
03 -
  • Measure your oats and flour by spooning them into your measuring cup and leveling off, not scooping directly from the container, which packs them down and throws off your ratios.
  • If your baking pan is smaller or larger than 9x9 inches, adjust your baking time accordingly—a deeper pan needs more time, a shallower one needs less.
  • These bars freeze beautifully, so make a double batch and tuck half in the freezer for mornings when you're running late.
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