Grate chocolate and heat it slowly over pan of hot water or in oven in a spoonful or two of water
Beat butter till soft. Add sugar and beat to a cream.
Sift flour and separate whites from yolks of eggs
Stir in yolks of eggs to butter and sugar
Then chocolate and ground almonds, also flour and mixing well
Whisk the whites of eggs very thoroughly and stiffly and fold in
The last thing before putting in oven, baking tin and bake 3/4 to 1 hour in moderate oven