WHOOPIE PIES
2 C. unsifted flour
1/3 C. unsweetened cocoa
1 t. baking soda
1/4 t. salt
3/4 C. milk
1 t. vanilla
1 egg
1/3 C. vegetable oil
1 cup sugar
Filling:
2 C. marshmallow spread
1 C. confectioners' sugar
1 stick unsalted butter, softened
1 t. vanilla
Heat oven to 350° F. Combine flour, cocoa, baking soda and salt in bowl; set aside. Combine milk and vanilla in measuring cup; set aside. Beat egg and oil in bowl of electric mixer until combined.
Add sugar to egg-oil mixture; beat until pale yellow, about 3 minutes. Add flour and milk mixtures alternately to egg mixture, beginning and ending with flour mixture.
Drop about 1 tablespoon of the batter onto greased cookie sheets, 2 inches apart. Bake until top springs back lightly when touched, 5-7 minutes. Remove to wire racks to cool.
For filling, combine marshmallow spread, confectioners' sugar, butter and
vanilla in bowl of electric mixer. Beat on medium speed until fluffy, about
2 minutes. Spread filling between 2 cake halves to make sandwich.