In water bath melt the butter with chocolate and milk, as well as the butter is to be cut, and chocolate can be broken into pieces in advance. In bowl, beat egg yolks with sugar and add them gradually and stirring the chocolate mixture. Separately, mix the cream and add carefully (not to be confused, and overturning) to the chocolate mixture. The finished sauce is poured into bowls alternating with a layer of crushed kisses and chopped hazelnuts. Allow to cool for at least 4 h.