Blueberry Crumble Bars
Buttery oat crumble bars with a jammy blueberry middle — easy to carry, easier to share, and worth the wait to cool.
Overview
Ingredients
Equipment
- 8x8-inch baking pan
- Parchment paper
- Mixing bowls
Method
Press the crumble crust
Heat the oven to 350°F and line an 8x8-inch pan with parchment. Mix the flour, oats, sugars, baking powder, and salt, then stir in the melted butter and vanilla until crumbly. Press two-thirds of the mixture firmly into the pan.
Spoon on the blueberry filling
In a bowl, toss the blueberries with the sugar, cornstarch, lemon juice, lemon zest, and vanilla. Spread the glossy filling evenly over the crust.
Crumble and bake
Sprinkle the remaining crumble over the top and bake 33 to 38 minutes, until golden and bubbling. Cool completely before slicing into bars.
Tips
Nutrition
Storage
Frequently asked
Can I use frozen blueberries?+
Yes — do not thaw them; just fold them straight into the filling.
How do I get clean slices?+
Chill the cooled bars, then cut with a sharp knife for tidy edges.
How long do they keep?+
Up to 4 to 5 days in the fridge, or 2 months in the freezer.
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