This recipe provides instructions for making a frozen chocolate cake. The ingredients include biscuits, cognac, chocolate, margarine, eggs, sugar, and cream. The steps are to dip biscuits in cognac and layer them in a pan. Melt the chocolate and margarine together and cool slightly. Beat the egg yolks and add to the chocolate mixture. Beat the egg whites with sugar and fold into the chocolate mixture. Pour over the biscuits and freeze for 2 hours. Top with whipped cream before serving and return to the freezer until ready to serve.