Combine flour,salt & soda and set aside Soften butter, add to brown sugar and mix, add buttermilk and eggs and mix well, gradually add flour mixture till well blended Add mashed bananas and mix well, add nuts if desired Pour into 2 greased loaf pans Bake 350 for 55-65 minutes If using dark pan you may want to reduce the heat by 25 degrees Check for doneness with a toothpick. If making 8 smaller loafs bake for 25-30 minutes.