1/8 c. cocoa
1/4 c. milk
1/4 c. butter
1/8 tsp. vanilla
3 c. powdered sugar

Put first 3 ingredients in pan and heat until butter and cocoa are melted. Remove and add vanilla; add 1/2 of sugar and remaining sugar and knead. If mixture is soft, add more sugar. Press in pan and chill. When firm, cut.