Shortening means Criso here in the South and if you ever run across oleo, that's margarine! This is my grandmother's recipe and it is absolutely wonderful!!

Preheat oven to 350. Cream butter and Crisco and add sugar. Add eggs one at a time Sift together flour, soda, salt , powder, and cocoa in a separate bowl. Add flour mixture alternately with buttermilk, beginning and ending with flour mixture. Add Vanilla Pour into tube pan that has been sprayed with Baker's Joy or that has been greased and floured. Bake for about an hour and a half or until broom straw or cake tester comes out clean when stuck in.