Given the task definition and input, reply with output. 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.

______,Gradually add whipped topping and confectioners sugar, beating until smooth.,Spoon into prepared crust.,Freeze or refrigerate 8 hours.,Garnish with chocolate shavings.
Combine cream cheese and peanut butter; beat until light and fluffy.