1/2 c. butter
1 c. sugar
1 egg
2 c. flour
1/2 c. cocoa
1/2 tsp. baking soda
1/2 tsp. baking powder
1/4 tsp. salt
1 1/3 c. buttermilk or sour milk

Mix all together until mixed well. Drop by teaspoon about 3" apart on greased cookie sheet. Bake at 400 degrees for 7 to 9 minutes or until edges are firm and cookie is no longer shiny. Cool completely; spread mint filling between 2 cookies for your Yo Yos.

MINT FILLING:

3 c. powdered sugar
6 tbsp. butter, softened
2 tbsp. milk
1/4 tsp. peppermint extract
3-4 drops green food color

Beat on low speed until creamy. May add a little milk to be above to spread.