Orange Creamsicle Cake By Susie of Lee County, Va. 1 box Orange Supreme Cake mix (DUNCAN HINES) 1 teas. orange extract Mix as directed on package but substitute milk for water and add 1 teaspoon of orange extract, bake as directed, in 2 - 9" round pans. Cool cake completely then split cake to make 4 layers. Icing 1 16 oz cool whip 1 16 oz sour cream 1 cup of powder sugar Mix and frost