Preheat your oven to 350 degrees. Grease or spray with cooking spray a 9 x 5 loaf pan.Mash the bananas in a medium mixing bowl until smooth.
Mash the bananas in a medium mixing bowl until smooth.
Whisk in the butter, oil, eggs, buttermilk and vanilla until well combined.
Mix flour, granulated sugar, brown sugar, baking soda and salt in a large bowl. Add 1/2 cup chopped nuts if desired.
Pour wet ingredients into the dry ingredients and stir with a wooden spoon just until combined.
Bake for 45-55 minutes, or until a toothpick inserted in the center comes out clean. Bread will be cracked on top and golden brown.
Cool in the pan for 10 minutes, then transfer to a wire rack.
Notes: *Use very ripe bananas - heavily spotted or even black bananas give the best flavor and moisture. *Don't overmix the batter, it keeps the bread soft. *Wrap leftovers tightly - banana bread tastes even better the next day! *Optional add-in ingredients: 1/2 tsp cinnamon, 1 cup chocolate chips, 1/2 cup chopped nuts or a swirl of Nutella. *Make banana bread French toast with leftovers. *Keep at room temperature up to 3 days in anirtight container. Refrigerate up to a week. Freeze by wrapping slices individually for up to 3 months.