ALL IN ONE CHOCOLATE CAKE NIGELLA RECIPES

Steps:

• Note: You can leave out the baking powder and bicarb if dietary requirements make that desirable, but in that case, I'd use a 23cm tin instead and expect it to need slightly less cooking time.

  Put the whole orange or oranges in a pan with some cold water, bring to the boil and cook for 2 hours or until soft. Drain and, when cool, cut the oranges in half and remove any big pips. Then pulp everything – pith, peel and all – in a food processor, or see below if you're proceeding by hand.

  Once the fruit is cold, or near cold (though actually I most often cook the oranges the day before I make the cake), preheat the oven to gas mark 4/180°C. Butter and line a 20cm springform tin.

  Add the eggs, baking powder, bicarbonate of soda, almonds, sugar and cocoa to the orange in the food processor. Run the motor until you have a cohesive cake mix­ture, but still slightly knobbly with the flecks of puréed orange. Or you could chop the fruit finely by hand, and with a wooden spoon beat the eggs one by one into the sugar, alter­nating with spoons of mixed ground almonds and cocoa, then the oranges, though I have to say I've only ever made this the lazy way.

  Pour and scrape into the cake tin and bake for an hour, by which time a cake tester should come out pretty well clean. Check after 45 minutes because you may have to cover with foil to prevent the cake burning before it is cooked through, or indeed it may need a little less than an hour; it all depends on your oven.

  Leave the cake to get cool in the tin, on a cooling rack. When the cake is cold you can take it out of the tin. Decorate with strips of orange peel or coarsely grated zest if you so wish, but it is darkly beautiful in its plain, unadorned state.

Steps:

• Preheat the oven to 170C/325F/Gas 3. Grease a 23cm/9in springform cake tin with a little oil and line the base with baking parchment.
• Measure and sift the cocoa powder into a bowl or jug and whisk in the boiling water until you have a smooth, chocolatey, still runny (but only just) paste. Whisk in the vanilla extract, then set aside to cool a little.
• In another smallish bowl, combine the ground almonds (or flour) with the bicarbonate of soda and a pinch of salt.
• Put the sugar, olive oil and eggs into the bowl of a freestanding mixer with the paddle attachment (or other bowl and whisk arrangement of your choice) and beat together vigorously for about three minutes until you have a pale-primrose, aerated and thickened cream.
• Turn the speed down a little and pour in the cocoa mixture, beating as you go, and when all is scraped in you can slowly tip in the ground almonds (or flour) mixture.
• Scrape down and stir a little with a spatula, then pour this dark, liquid batter into the prepared tin. Bake for 40-45 minutes or until the sides are set and the very centre, on top, still looks slightly damp. A cake tester should come up mainly clean but with a few sticky chocolate crumbs clinging to it.
• Let it cool for 10 minutes on a wire rack, still in its tin, and then ease the sides of the cake with a small metal spatula and spring it out of the tin. Leave to cool completely or eat while still warm with some ice cream, as a pudding.