Was in a baking mood. Here is the recipe.
Using a stand mixer with paddle attachment, cream butter and sugar together until light and fluffy.
In a small bowl, beat eggs using a fork. Add eggs to sugar mixture and beat until combined. Add mashed bananas and combine.
Sift or whisk to combine dry ingredients: flour, baking soda, baking powder, and salt. Slowly add sifted dry ingredients to banana mixture and mix until flour is just combined. DO NOT OVERMIX! Fold in blueberries.
Pour batter into prepared loaf pans and bake at 350 for about 40 minutes. The edges will be slightly brown and a toothpick or knife should come out clean. Cool completely before removing from loaf pans.