Sift the dry ingredients together in a bowl. In another small bowl, beat eggs together with the vanilla extract. Cream the butter in the stand mixer, add sugar and cream until well blended. Add eggs slowly. Alternate additions of the dry ingredients and the buttermilk. Pour into a greased and floured 12-inch tube or Bundt pan and bake at 325F for 1 hour, or until cake pulls away from sides of pan. Cool for 15 minutes in pan, then turn out to cool completely.