3 2/3 c. (1 lb.) pkg. powdered sugar, sifted
1/2 c. cocoa
1/2 c. butter, cut into pieces
1/4 c. milk
1/2 c. chopped nuts (optional)
1 tbsp. vanilla

Combine powdered sugar, cocoa, butter and milk in medium microwave - proof bowl. Microwave at high (100%) for 2 to 3 minutes or until butter is melted. Stir until mixture is smooth. Stir in nuts and vanilla; blend well. Spread evenly in buttered 8 inch square pan; cool. Cut into 1 inch squares.