These are so filling and perfect for breakfast. There's also a Paleo version!
In a large mixing bowl, combine the dry ingredients and mix well.
In a small bowl, whisk the milk, vanilla extract, and flax egg. Pour into the dry mixture. Add the melted nut butter and mix very well until a batter is formed. Divide the batter in half. In one-half, fold in the blueberries.
Pour the blueberry filled batter to evenly cover the baking tray or loaf pan. Top with the other half of the batter. Bake for 25-30 minutes, or until golden brown on top and a toothpick comes on clean. Remove from oven and allow to cool completely before serving or frosting, if desired.