cream below:1 stick butter, room temp
1 C sugar
sift together then add to above mixture:
1 1/2 C flour
1 t baking soda
1 t salt
combine then add to above mixture:
1 C mashed ripe bananas
1/2 C sour cream or plain yogurt
1 t vanilla extract
stir in 1/2 C walnuts & 1/2 C chocolate chips (if desired)
Bake in one greased loaf pan at 350 degrees for 1 hour.
Cool in pan for 10 minutes, then turn out onto cooling rack.