Toast the festive season with our Christmas cocktail ideas, including sloe gin fizz and spiced negronis
Heat the oven to 180C/fan 160C/gas 4. Butter and lightly dust with cocoa a 22-23cm round cake tin with a springform or loose bottom, tipping out the excess. Put the chocolate, Nutella, sugar and butter in a big saucepan and melt slowly over a very low heat, stirring occasionally. Remove from the heat to stir in the ground hazelnuts then egg yolks, one at a time.
Beat the egg whites until stiff peaks form, then spoon a third of the whites into the chocolate mixture and mix in well to loosen it. Gently fold in the rest of the whites with a big metal spoon or spatula.
Scrape the mixture gently into the tin, scatter with the chopped hazelnuts and bake for 30-35 minutes until the top surface is crisp but doesn’t feel quite set underneath. Cool completely.
To serve, remove the cake from the tin and dust with a little cocoa plus pinches of icing sugar if you like. Put the double cream, Baileys, 1 tbsp icing sugar and salt in a bowl and whisk until thickened and just holding its shape. Cut the cake into thin slivers and serve with spoonfuls of the cream.