2 (1 oz.) sq. unsweetened chocolate
2 tbsp. butter
1 c. sifted confectioners sugar
1/4 tsp. salt
1 egg
1 c. cream for whipping
1 tsp. vanilla

Melt chocolate and butter in top of 2 quart double boiler over hot - not boiling water; stir in remaining ingredients. Place top of double boiler in ice water; beat with rotary beater 3-4 minutes or until frosting is fluffy. Makes enough to frost top and sides of one 9 inch layer cake.