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 together sugar and shortening; add sour milk with soda and mix.,Add flour and mix; add the cocoa mixture to batter.,______,Bake at 350 for 35 to 40 minutes in an 8 x 8-inch pan.
Add vanilla; mix well.