Blend in mixing bowl :

1 1/3 cups sifted confectioners' sugar
1/4 cup soft butter
1/4 cup milk
3 sq. unsweetened chocolate, melted (= 84 gr -- 1 bâton = 25g)
1 tsp. vanilla

Add :

1 whole egg

Beat just until frosting is smooth.

Place bowl into fridge and wait until thick enough to spread.




PS : confectioners' sugar = sucre impalpable