1 lb. box powdered sugar
1/2 c. cocoa - or peanut butter
1/2 c. butter
1/4 c. milk
1/2 c. miniature marshmallows

Mix all ingredients and microwave 1 minute on high. Take out and stir and microwave 1/2 minute on high. Then stir again and microwave 1/2 minute on high. Take out and stir good, add 1/2 teaspoon vanilla and 1/2 cup nuts, if desired. Stir and pour into 8 x 8 inch square pan. Cool. Cut into squares.