From 1922:
Take ½ lb. chocolate, ¾ lb. castor sugar, 3oz. ground almonds, vanilla, 1 egg. Put the chocolate freshly grated into a basin with the sugar and almonds. Flavor with the vanilla, mix with the egg, which must be well beaten. Line a baking dish with buttered paper and drop the mixture on it in small lumps of equal size. Bake in a moderate oven for 20 minutes, and the result will prove a tempting delicacy.