2 tablespoons Cornstarch (Arrowroot powder is a great alternative)
2 cups Blueberries (Fresh or frozen blueberries work well)
1 large Lemon (Use fresh lemons for zest and juice)
1/4 cup Sugar
1 tablespoon Cornstarch
Instructions
Preheat your oven to 350°F (175°C) and line an 8×8-inch baking pan with parchment paper.
In a mixing bowl, cream together 1/2 cup of butter and 1/2 cup of sugar until light and fluffy, about 3 minutes.
Gradually add 1 1/2 cups of gluten-free flour and 2 tablespoons of cornstarch until the mixture resembles a crumbly dough.
Transfer the crust mixture into the prepared pan, pressing it evenly across the bottom.
Pre-bake the crust for 15-20 minutes until slightly golden around the edges.
In a medium saucepan, combine 2 cups of blueberries, zest and juice of 1 lemon, 1/4 cup of sugar, and 1 tablespoon of cornstarch. Cook over medium heat for about 5-7 minutes until bubbly.
Pour the filling over the pre-baked crust and crumble the remaining crust mixture on top.
Return to the oven and bake for an additional 25-30 minutes until the top is golden brown and filling is bubbling.
Allow the bars to cool completely in the pan for at least 1 hour before slicing.