Chocolate Whoopie Pies - cooking recipe

Ingredients

For the pies
2 cups flour
1 cup sugar
1/3 cup cocoa
1 teaspoon baking soda
1/4 teaspoon salt
1 egg
1/3 cup salad oil
1 teaspoon vanilla
3/4 cup milk
Filling
1/2 cup butter (1 stick) or 1/2 cup margarine (1 stick)
1 cup confectioners' sugar
1 cup marshmallow cream
1 teaspoon vanilla
1/8 teaspoon salt

Preparation

Heat oven to 350 degrees. Mix together flour, sugar, cocoa, baking soda and salt in a mixer bowl. Add egg, oil and vanilla; slowly beat in milk until combined, about 2 minutes.
Drop batter by tablespoons onto parchment-lined baking sheets, leaving room between each for spreading. Bake 12 minutes. Cool completely on wire racks.
For filling, combine all ingredients in a bowl; beat until smooth. Spread about 2 tablespoons of the filling per cookie on the flat side of half of the cookies. Top with remaining cookies to make sandwiches.