Preheat the oven to 375 degrees and either lightly grease or line an 8x8 baking pan with parchment paper and set it aside.
Combine the ingredients for the crust and crumb into a bowl. Using a fork work it together until it becomes crumbly, reserve about 1 cup of the mixture and set it aside.
Place the remaining mixture to the baking pan and gently press the mixture until it covers the bottom of the baking pan.
Bake the crust in the 375-degree oven for about 15 minutes.
While the crust bakes combine the filling ingredients into a bowl and stir till combined.
Once the crust has baked for a few minutes, top with the berry mixture and sprinkle the top with the remaining crumble topping that was reserved.
Place the mixture back into the oven and bake for an additional 30-35 minutes, until the top is golden brown and the blueberry mixture is bubbly.
Allow the mixture to cool completely, at least 4 hours before cutting into squares.
Store them in the fridge for up to a week.
Notes
For this Blueberry Crumb Bars recipe, you really can use any fruit if blueberries aren’t your favorite. You can even use fresh or frozen, but it works best if they are slightly thawed before baking.
If there is a lot of juice in the bottom of the bowl after tossing the berry filling ingredients together, don’t add it to the crumb bars. This can add too much liquid, and the bars will be soggy.
The trick to perfect crumb topping is to use completely cooled to room temperature butter. Hot will cook the mixture, and the crumbs won’t form. It’s helpful to stir the dough with a fork to make perfect size crumbs.
Make sure your bars have completely cooled before cutting into them. I like to leave them at least 4 hours.
Nutrition
Calories: 173kcal
Keyword blueberry crumb bar, blueberry recipe, crumb bars, gluten free crumb bar