For these fudgy treats, you spread the frosting on the cookies before baking. Just be sure to use real chocolate (not imitation) because a not-so-real product will not bake properly.
In a mixing bowl combine flour and cocoa; set aside. In a large mixing bowl beat the butter or margarine with an electric mixer on medium to high speed about 30 seconds or until softened. Add sugar, salt, baking powder, and baking soda. Beat until well combined. Add egg and vanilla. Beat well. Gradually beat in the flour mixture.
Shape dough into 1-inch balls; place on ungreased baking sheet. Press down center of each ball with thumb. Drain maraschino cherries, reserving juice. Place a cherry in the center of each cookie. In a small saucepan combine the chocolate pieces and sweetened condensed milk; heat until chocolate is melted. Stir in 4 teaspoons of the reserved cherry juice.
Spoon about 1 teaspoon of the frosting over each cherry on unbaked cookie, spreading to cover cherry. (Frosting may be thinned with additional cherry juice, if necessary.)
Bake in 350°F oven about 10 minutes or until done. Remove to wire rack; cool. Cover and store at room temperature up to 2 days. Makes 48 cookies.