1 box powdered sugar
1/2 c. cocoa
1 stick butter
1/4 c. canned cream (pet milk)

Mix powdered sugar and cocoa together in a ziploc bag. Pour in bowl. Lay stick of butter on top of mixture. Add cream to mix over butter. Do not stir. Microwave on high for 2 minutes. Remove and stir well until thick. Butter dish; pour into dish and let stand or refrigerate until firm.