1 lb. confectioners sugar (3 2/3 c.)
1/2 c. cocoa
1/4 c. milk
1 stick butter
1 tbsp. vanilla
1/2 c. nuts (optional)
1 - 2 tbsp. peanut butter

Put first 4 ingredients into a large microwave safe bowl (do not mix). Place in microwave on high for 3 minutes. remove from microwave, add the rest of the ingredients except nuts and stir to remove all lumps, add nuts if desired.

Pour into a 8 inch square pan. Cool and cut.