Grandma Dougoveto's Judy Frosting (for Angel Food Cake)

1 cup powdered sugar (*heap just a little)
2 squares of baking chocolate (*UNsweetened)
1 Tbsp. butter
3 Tbsp. milk
1 tsp. vanilla
1 egg

1. Melt chocolate and butter on really low heat.
2. Meanwhile, place sugar, egg, milk and vanilla in a small plastic bowl; DO NOT mix yet.  Also, prepare a LARGER bowl (that will fit the sugar bowl) of cracked ice and a little water at this point (for step 4).
3. When chocolate is melted, take off heat and stir a little to cool a bit.
4. Pour the chocolate mixture over the sugar mixture and place THAT BOWL in a bowl of cracked ice & a little water.
5. Beat until spreading consistency (the more you beat, the more the constancy will alter).