1 box powdered sugar
1/3 c. cocoa
1/2 c. butter
1/4 c. Pet milk
1 tsp. vanilla

Pour powdered sugar and cocoa into a bowl. Use a fork and mash any lumps. Make a well in the center of the sugar and cocoa and add the Pet milk, vanilla and butter, cut up. Don't stir. Cook on high power in the microwave for 2 to 2 1/2 minutes.

While this is cooking, line a dish with wax paper. (I use a small loaf pan.) Use a portable mixer and beat until the fudge has lost its "shininess." Pour into the dish and refrigerate until set.