How to make chocolate, chilli and chestnut cake – recipe

 Photograph: Krause Johansen

Chilli and chocolate have become a well-loved combination. Thoroughly pureed chestnuts add a subtle sweet flavour and a grainy texture, similar to ground almonds.

(Serves 10)

4 medium eggs

140g caster sugar

250g dark chocolate

250g unsalted butter

1-2 teaspoons chilli powder, to taste

250g cooked chestnuts

275ml milk

2-3 drops almond essence

Preheat the oven to 170C/325F/gas mark 3. Grease and line a 23cm springform cake tin with baking parchment.

Separate the eggs. Beat the yolks with the caster sugar.

Roughly chop the chocolate and put it into a small saucepan with the butter. Gently melt the chocolate and butter together. Stir in the chilli powder and mix well to avoid any lumps. Leave to cool a little, then stir into the egg yolks and mix thoroughly.

Peel the chestnuts if they still have their outer skins on. Roughly chop and put them into a small saucepan with the milk. Bring to the boil, stir in the almond essence and leave to cool for a few minutes before transferring to a food processor. Process until smooth and add to the chocolate mixture, mixing well to prevent any pale streaks in the cake.

Beat the egg whites to soft peaks and gently fold them into the chocolate mixture. Spoon the mix into the prepared tin, smooth the top and bake for up to 45 minutes – it may still be a bit wobbly. Leave to cool before taking the cake out of the tin and slicing to serve.

• Extracted from the Vegetarian Year by Jane Hughes (Modern Books, £20). To order a copy for £16, go to bookshop.theguardian.com or call the Guardian Bookshop on 0330 333 6846. Free UK p&p over £10, online orders only. Phone orders min p&p of £1.99.