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.

Preheat oven to 325. Melt margarine. Add flour and nuts.,Mix well. Spread mixture in bottom of a 9 x 13-inch pan.,Bake in oven for 25 minutes. Let cool.,Beat the cream cheese, powdered sugar and Cool Whip together. Spread on top of crust. Make pudding according to package. Spread on last layer. Spread remaining Cool Whip on top and garnish with nuts.,______
Chill until served.