Whoopie Pies - cooking recipe

Ingredients

2 c. flour
1/2 c. cocoa powder
1 1/4 tsp. baking soda
1 tsp. salt
1 c. buttermilk
1 tsp. vanilla
1 stick (1/2 c. unsalted butter, softened)
1 c. brown sugar
1 egg

Preparation

Preheat oven to 350\u00b0.
Mix together flour, cocoa, baking soda, and salt.
In separate bowl stir together buttermilk and vanilla. Beat together butter and brown sugar in a large bowl with an electric mixture at medium-high speed about 3 minutes (5 minutes with a hand held).
Add egg, beating until combined well.
Reduce speed to low and alternately mix in flour mixture and buttermilk in batches, beginning and ending with flour.
Spoon 1/4 c. mounds of batter about 2 inches apart onto 2 buttered baking sheets.
Bake until cake springs back when touched, 12-14 minutes.
Cool completely.