These two recipes began with one 500g pot of Creme de Marrons...
Gâteau Ardéchois
This is NOT a low sugar recipe. Creme de marrons is in itself very high in sugar, which is why the recipe doesn't have a lot of added sugar.
2 eggs
20g caster sugar
80g very soft butter
380g sweetened chestnut purée
100g self-raising flour
Whisk the sugar and eggs together until thickened. Add and whisk the butter. Add the purée and whisk until thick and smooth. Then fold in the flour until completely combined. Put the mixture into a lined 20cm cake tin. Bake at 180c for 30 minutes. As this adventure had itself begun with some chestnut honey, I powdered with icing sugar and then drizzled honey over the top, very sparingly.
I then had 120g of creme de marrons left;afte r it had sat in the fridge for a week or so I needed to use it up.
Gâteau de Rosières en Vivarais
This recipe is a tweak of a lovely chocolatey recipe I've used before. The essential charm of this recipe is the melted chocolate/cocoa/butter base (which I also strongly recommend as a brownie base).
Ingredients
125g unsalted butter
150g plain chocolate
1 tablespoon of unsweetened cocoa
120g crème de marrons
3 eggs
100g cristal sugar
40g viergoise sugar
75g farine à gâteau
Preheat your oven to 180c. Prepare a 20cm tin by lining with greased parchment or inserting a parchment baking liner.
Method
Melt together in a pan
125g unsalted butter
150g plain chocolate
1 tablespoon of unsweetened cocoa
100g crème de marrons
Using a stand mixer (whisk attachment), beat together
3 eggs
100g cristal sugar
40g viergoise sugar
Keep whisking fast until light and creamy. It will take on the texture of whipped cream.
Whisk the chocolate mixture into the sugar &eggs - it will become thick and mousse like.
Carefully fold in 75g Farine à gâteau, mixing gently until smooth.
Spread into a prepared 20cm lined cake tin. Bake at 180c 25mins. Remove when a skewer comes out almost clean. This is a moist, dense cake which most resembles a French Moelleux (a sticky centred dessert cake). Leave on a rack until cool. Decorate the top with sifted icing sugar.
I used 80% cocoa solids chocolate, but anything 70% upwards is perfect.
For UK ingredients use caster sugar, Demerara sugar, and self raising flour. There is no substitute for crème de marrons, which you may find in a high end supermarket.