Preheat oven to 425 degrees. ... sugar, marshmallow and vanilla together until smooth and creamy. Frost the "whoopie pie" bottoms and put the ... about 1 1/2 dozen.
Cream shortening, sugar, egg, milk, salt and vanilla together. Blend flour, baking soda ... flat side of Whoopie Pie, cover with flat side of second pie. Wrap individually.