In this task, you will be presented with the directions of a recipe separated by "," and have to fill in the "___" which is a step that is missing from the recipe.

Be sure to reserve 1 Cup sugar for the egg whites.,Separate egg yolks and whites.,Mix all ingredients except whites.,______,Gently fold the beaten egg whites into the cake batter.,Bake in 350 degree oven for 1 1/2 hours or until done.
Beat egg whites and add 1 Cup sugar continuing to beat until the whites are stiff.