Preheat oven to 350°F

Spray two 9 x 5 inch loaf pans with nonstick spray

If you don't have buttermilk, add 1/2 tsp lemon juice to the milk, stir and let stand a few minutes

Combine the butter, oil and sugar: Whisk or beat together the melted butter, oil and sugar in a mixing bowl until combined

Add the eggs: Whisk until completely combined and the mixture is smooth.

Add the milk and vanilla: Whisk the milk and vanilla into the batter.

Add banana to mixture and stir

Sift the flour, baking soda, and salt into wet ingredients. Mix until flour is incorporated. Do not overmix

Stir in nuts or chocolate

Pour into prepared loaf pans and bake 50-55 minutes or until toothpick inserted in center comes out clean

Or makes 12-16 muffins.. Bakes for 20-25 minutes