1 lb. powdered sugar, sifted
1/2 c. cocoa
1/4 c. milk
1/2 c. butter
1 tbsp. vanilla
1/2 c. chopped walnuts

Put all ingredients, except vanilla and nuts, in microwavable bowl. Microwave on high until butter is melted, 2-3 minutes. Stir until smooth. Mix in vanilla and nuts. Spread in buttered 8x8 inch pan; cool. Cut into 1-inch squares.