Separate the egg whites and yolks, beat the egg whites until they become foamy, and then add vanilla sugar.
Separately, beat the egg yolks with sugar until the sugar dissolves well. Then add the meringue little by little, while mixing.
Melt the chocolate and butter together until you get a homogeneous mass, add it to the egg mass, and beat well until it turns brown.
Then divide it into cups and put it in the freezer for a few hours. Bon Appetit!