1. Preheat oven to 350 degrees and prep a loaf pan (9×5 or 8×4) by greasing it or lining it with parchment paper.
2. In a medium bowl add bananas and use a fork to mash well.
3. Add egg, vanilla, brown sugar and granulated sugar. Stir well.
4. In a separate bowl combine flour, baking soda, baking powder and salt.
5. Add dry ingredients into the wet slowly as you stir. Before the two are incorporated add in melted butter. Stir just until barely combined, DO NOT OVER MIX.
6. Pour into pan and bake for 30-45 minutes or until an inserted knife or toothpick comes out clean.
7. Serve warn or cooled. As with any banana bread/cake, it always tastes better the next day! Store in an airtight container.