Buttery, tender crust layered with jammy blueberries and lemon zest—these Blueberry Lemon Bars are a must when you want something fruity, fresh, and homemade.
Preheat the oven to 375 degrees Fahrenheit (190 degrees Celsius). Grease a 9×13-inch pan (baking Pam works great).
To Prepare the Crust/Topping
In a medium mixing bowl, whisk together sugar, flour, baking powder, and salt. Using a pastry cutter, blend in butter and egg until the dough becomes crumbly. With your hands, pat half of the dough into the bottom of the prepared baking pan. Set aside.
To Prepare the Filling
In a medium mixing bowl, combine sugar, cornstarch, vanilla, lemon juice, and zest. Carefully fold in blueberries, making sure to coat the berries evenly. Pour the blueberry mixture over the crust. Adjust any blueberries that are out of place, filling in holes. Evenly sprinkle the remaining topping over the berry layer.
Bake for 45–50 minutes, or until the top begins to brown and the blueberries bubble. Remove from the oven and place the pan on a wire rack to cool (about 30 minutes). Cut into bars or squares when cool.
Notes
STORE Lemon Blueberry Crumb Bars in an airtight container at room temperature for up to 2 days once cooled. If you want them to last longer, refrigerate for up to 5 days. To FREEZE, layer the bars with parchment paper between each layer in a freezer-safe container or zip-top bag. They’ll keep for up to 3 months.When ready to serve, thaw in the fridge overnight. If you prefer them warm, you can microwave a slice for about 10–15 seconds.