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.

Cream butter; gradually add in sugar, beating till light and fluffy.,Add in egg yolk, beating well.,______,Gradually add in flour; mix well.,Stir in crushed candy.,Shape mix into 1 inch balls and roll in sugar.,Place on ungreased cookie sheets.,Bake at 350 degrees for 15 min.,Remove immediately from cookie sheets and cold on wire racks.

Stir in flavorings.