Flourless chocolate cake is from King arthur
https://www.kingarthurflour.com/recipes/flourless-chocolate-cake-recipe
Th chestnut cake is in post 1861
https://www.backyardchickens.com/threads/any-home-bakers-here.921333/page-187#post-15520054
this is a
chocolate chestnut cake in my "like to try someday" file. (Might want to double check the measurements in parentheses, I did the conversions myself...math is not my strong suit.)
250g good quality dark chocolate (8.8 oz.)
250g butter (8.8 oz.)
250g peeled and cooked chestnuts, vacuum packed is fine
250ml milk (1 cup)
4 eggs, separated
125g caster sugar (2/3 cup)
Method
Grease and line a 25cm (9") round cake tin.
Melt the chocolate and butter in a pan over a gentle heat. In another pan heat the chestnuts and milk together until it just comes to the boil. Remove from the heat and mash the chestnuts into the milk until smooth.
Whisk the egg yolks and caster sugar together until combined. Pour in the chocolate mixture and the chestnut mixture and whisk together well.
In a very clean bowl whisk the egg whites until they form stiff peaks and then carefully fold into the chocolate and chestnut mixture. Pour the mixture into the tin and place in a preheated oven at 170°c (325F), for 25-30 minutes, until it is set, but it will still have a little wobble in the center. Leave in the tin to cool a little if you are serving warm or leave to cool completely. Sift cocoa powder over the top.