Dense, moist delicious banana bread.
Preheat oven to 350 degrees Fahrenheit. Spray a loaf pan with non-stick cooking spray. Cream butter and sugar until smooth, add the egg.
Sift the dry ingredients in a small bowl. Combine the bananas and buttermilk in another small bowl.
Add dry ingredients alternately with the banana mixture to the creamed butter mixture.
Pour into the loaf pan and bake for 50-60 minutes, until a knife comes out clean. Cool in the pan for 10 minutes and then let finish cooling on a wire rack.