Instructions: 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.
Input: Cream shortening and sugar thoroughly.,______,Add soda dissolved in vinegar.,Add vanilla.,Then add flour gradually to make a stiff batter.,Roll very thin.,Cut out and bake in moderate oven until brown.
Output:
Add egg and blend until creamy.