Blueberry Brownies Recipe

Preheat the oven to 350 degrees F (175 degrees C). Grease a 8-inch square baking pan.

Cook 2 cups blueberries in a large saucepan over medium heat. Add cinnamon and stir. Smash berries gently using a fork or a potato masher being careful that hot juices do not splash back. Cook until most of the liquid has evaporated and you have a thick syrup 8 to 10 minutes.

Remove blueberries from heat and stir in butter to melt. Add sugar and stir to combine. Pour in eggs when mixture has slightly cooled 1 at a time mixing well after each addition. Pour in vanilla extract and stir to combine. Fold in walnuts. Fold flour gently into mixture. Beat well 60 to 80 strokes adding up to 1/4 cup additional flour as needed if batter seems too wet. Add remaining 1/2 cup blueberries and stir to combine.

Pour batter into the prepared baking pan.

Bake in the preheated oven until a toothpick inserted into the center comes out clean 35 to 40 minutes. Let cool completely before cutting and serving.