Secret Chocolate Cake

To soak the raisins, place them in a bowl, pour over the Sauternes and cover. Leave for at least 2 hours or overnight, but they will keep (covered) for up to 1 month in the fridge.

Preheat the oven to 175°C fan. Line a cake tin with baking paper.

Whisk your egg yolks with a quarter of the sugar until pale, thick and custardy-looking – this takes about 5–6 mins on a high speed. Set aside.

Back to the cake. Melt your chocolate and butter over a bain-marie. Once melted, take off the heat and stir in the salt. Fold it into your whisked egg yolks in three additions.

Meanwhile, whisk your egg whites and the rest of the sugar until stiff peaks form and it turns glossy. Mix a little of the meringue in with your whisk to loosen the egg yolk/chocolate batter and then change to a spatula, folding the meringue into the chocolate mix in thirds, trying to keep as much air in as possible.

Pour half of the mix into the lined cake tin and smooth the top. Bake for 20–22 mins. The cake will rise up and be dry on top. Keep the other half of the batter to one side and cover with a tea towel or clingfilm to prevent it drying out. If possible, keep it near the oven so it stays warmish.

Remove the cake from the oven and leave it to fall and cool in the tin for approximately
20 minutes. It can still be warm, but you want to be able to handle the tin.

Sprinkle on the Sauternes-soaked raisins. Pour the second half of the batter on top and smooth with a warmed palette knife. Leave to cool to room temperature, then move into the fridge and leave overnight or up to 3 days.

To remove cleanly from the tin, freeze the cake for 30 minutes before demoulding. To finish, carefully remove from the tin and dust thickly with cocoa powder. If you froze the cake, let it defrost for 20–30 minutes before enjoying it. This keeps in the fridge for up to 3 days. You can also store it in the freezer, wrapped, for 30 days.