1 lb. powdered sugar
1/2 c. cocoa (Hershey's)
1 stick butter
1/4 c. milk
1 tsp. vanilla

If sugar is "lumpy", you may want to sift it. (Fudge will be smoother.)

Stir sugar and cocoa together in large bowl. Place stick of butter on top of mixture. Add milk. Do not stir. Microwave for 2 minutes on high. Remove and stir ingredients. Add vanilla, mix well. Pour into greased pan or dish and chill.