1 lb. powdered sugar
1/4 lb. butter
1 tsp. lemon juice
1 egg, beaten
1 c. chopped nuts
2 squares melted bitter chocolate or 1/4 c. cocoa, dissolved in sm. amount water
1 tsp. vanilla

beat egg and add lemon juice. Add butter, chocolate and vanilla. Add sugar gradually, beating all the while. If frosting is too thick, add hot strong coffee or cream, as much as is needed to make frosting thin enough to spread.