Preheat oven to 350^. Spray one 8x4-inch loaf pan the place a piece of waxed paper on the bottom only and spray it too. Set pan aside.
Using your mixer cream together the sugar and peanut butter.Add 1/2 the buttermilk. Mix until well blended.
To the remaining butter add the sour cream and the egg, whisk until blended.Set aside.
Add 1 cup of the flour to the batter. to the remaining flour mix the baking powder, soda and salt. Add this alternately with the remaining buttermilk mixture;beginning and ending with the flour. Beating well until smooth, be sure to scrape sides and bottom of bowl. Remove bowl from mixer and stir in crushed banana chips.
Pour batter into prepared pan. Bake for 55 minutes to 1 hour or until toothpick inserted in the center comes out clean. Turn off oven and leave bread in oven for 3 minutes, remove to wire rack to cool for 5 minutes. Remove bread from pan,and take waxed paper off the bottom. Cool completely on wire rack. Butter top, sides and ends, for soft edges for slicing.
Just out of the oven.
You can use 1 or 2 teaspoons of banana extract in place of the banana chips and add 1/2 cup of chopped walnuts.
you can use crunchy peanut butter and banana extract.