1 lb of Sweet Cream Butter
½ Lb of Shorting (Crisco not butter flavored)
2 Lb of Powdered Sugar (10X)
5oz of Egg Whites (5 large eggs)
1 Tbsp of Vanilla (not imitation)
Mix Butter and Shorting together until light and fluffy. Slowly add egg whites until incorporated and mixture looks dry.
Add powdered sugar slowly and at a slow speed on the mixer (unless you want powered sugar on your ceiling, this is the voice of experience talking)