Whisk together flour, baking soda, baking powder and salt in medium bowl; set aside.
Stir together bananas, peanut butter, oil, eggs, sugar, and brown sugar in large mixing bowl. Add the dry ingredients and stir just until combined. Fold in Reese's mine cups. Pour batter into prepared loaf pan.
Bake for 1 hour or until toothpick inserted comes out clean. Cool on wire rack.