Home Made Twinkies and Zingers For cakes: 1 (18.25 oz.) box yellow cake mix 3 whole eggs 1/3 c. vegetable oil 1 c. water 1 (5.1 oz.) instant vanilla pudding mix Filling: ½ c. butter, room temperature ½ c. shortening, room temperature 1 t. vanilla ¼ t. salt 3 c. confectioner’s sugar 1 (7 oz.) container marshmallow fluff