1/2 cup butter (no substitutes)
3 (1 ounce) squares unsweetened chocolate
1/2 cup sugar
1/2 cup packed brown sugar
1/4 cup buttermilk
1 teaspoon peppermint extract
1 3/4 cups all-purpose flour
1/2 teaspoon baking powder
1/4 teaspoon baking soda
1/4 teaspoon salt
In a microwave or heavy saucepan, melt butter and chocolate; stir until smooth. In a mixing bowl, beat sugars and egg; add buttermilk and peppermint extract. Beat in chocolate mixture. Combine the flour, baking powder, baking soda and salt; gradually add to sugar mixture. Let stand for 15 minutes or until dough becomes firmer.
Drop by tablespoonfuls 3 in. apart onto ungreased baking sheets. Bake at 175 degrees C for 8-10 minutes or until edges are firm. Cool for 2 minutes before removing from pans to wire racks.