Description

Bake up these sweet and chewy Blueberry Oatmeal Bars—bursting with juicy berries and hearty oats. Perfect for snacks, breakfast, or dessert!

Ingredients

For the Crust & Topping:

1 1/2 cups old-fashioned rolled oats

1 1/4 cups all-purpose flour

3/4 cup brown sugar, packed

1/2 teaspoon cinnamon

1/4 teaspoon salt

3/4 cup unsalted butter, melted

For the Blueberry Filling:

2 cups fresh or frozen blueberries

1/3 cup granulated sugar

1 tablespoon cornstarch

1 tablespoon lemon juice

1 teaspoon lemon zest

Optional: 1/2 teaspoon vanilla extract

Instructions

Step 1: Preheat the Oven

Preheat your oven to 350°F (175°C). Grease a 9×9-inch baking pan or line it with parchment paper.

Step 2: Make the Crust and Topping

In a large bowl, mix together the oats, flour, brown sugar, cinnamon, and salt. Stir in the melted butter until the mixture is crumbly and evenly combined.

Step 3: Prepare the Blueberry Filling

In a medium bowl, toss the blueberries with sugar, cornstarch, lemon juice, zest, and vanilla (if using).

Step 4: Assemble the Bars

Press about two-thirds of the oat mixture firmly into the bottom of the prepared baking dish to form the crust. Pour the blueberry mixture evenly over the crust. Sprinkle the remaining oat mixture on top, gently pressing it down.

Step 5: Bake

Bake for 35–40 minutes, or until the top is golden brown and the filling is bubbling.

Step 6: Cool and Slice

Allow to cool completely in the pan before slicing into bars — this helps them firm up for cleaner cuts.

Notes

Use rolled oats, not quick oats, for the best chewy texture.
Don’t skip the lemon — it brightens the blueberries and adds freshness.
Cool completely before slicing or they may fall apart (but sneaking a warm corner is totally understandable!).

Keywords: blueberry oatmeal bars, oat bars, breakfast bars, blueberry recipes, fruit dessert, oatmeal dessert, easy snack bars, make-ahead breakfast, homestyle baking