1Cream the butter and sugar well until light and fluffy, about 5 minutes. Add eggs 1 at a time, waiting between until each is incorporated.
2Sift all the dry ingredients together in a separate bowl. Add the flour mixture and buttermilk alternating beginning and ending with the buttermilk on slow speed of mixer. Add raisins and mix in well.
3Spoon into two greased large loaf pans or three medium sized pans. Bake at 325 degrees. For two large pans bake for 1 1/2 hours. For three medium pans, bake for an hour and check for doneness.