3/4 cup (1 1/2 sticks) butter
1 cup sugar
1 egg
2 cups sifted all-purpose flour
1 tsp. baking powder
1/2 tsp. baking soda
1/2 tsp. teaspoon salt
3/4 cup cocoa
1/4 cup milk
1/2 tsp. vanilla

Cream butter. Add sugar and beat until light and fluffy. Add egg and beat well.

Sift flour, baking powder, baking soda, salt and cocoa together. Add with milk and vanilla. Shape the dough into long rolls, 1-inch in diameter. Wrap each roll in waxed paper. Chill.

Cut chilled rolls into 1/8-inch slices.

Bake on baking sheet at 325°F for 10 minutes. Remove from baking sheet while warm.

When cooled, put cookies together, sandwich style, with Mint Filling.

MINT FILLING:

3 tbsp. butter
1 1/2 cups confectioners' sugar
3 tbsp. milk
4 to 5 drops mint flavoring
green food coloring

Combine all ingredients and beat until smooth and creamy.

Makes 7 dozen cookies.