Whoopie Pies - cooking recipe

Ingredients

1 c. shortening
2 c. sugar
2 eggs
1 c. sour milk *
4 c. flour
2 tsp. salt
1 c. cocoa
2 tsp. baking soda
2 tsp. vanilla
4 tsp. baking powder

Preparation

*One tablespoon vinegar, then add milk to equal 1 cup.