Aunt Mary's Buttermilk Cake will bring back memories with the first bite. It will remind you of those glorious childhood days when you got to sneak a little piece after school while dinner was cooking. This cake is light and airy with a tender crumb, and it just tastes like home. To make Aunt Mary's Buttermilk Cake, add baking soda to the boiling water and set aside. Cream the shortening and sugars, then add eggs and vanilla. Sift together the dry ingredients, and add to the the creamed mixture alternately with rich and creamy Smith's Buttermilk. Add the soda mixture and pour into prepared pans, then bake for about half an hour at 350 degrees. Aunt Mary's Buttermilk Cake doesn't need much attention before you serve it. You can give it a light sprinkle of powdered sugar or top it with your favorite fruit or buttercream. Then just close your eyes and taste the memories!