Nigella Lawson Chocolate Orange Cake

This recipe was meant to have an orange glaze on top, however I improvised with chocolate buttercream icing and decorated the top with Terry's Chocolate Orange. The cake recipe is very easy to do and worth the wait.

Ingredients:
1 large orange or 2 small, weighing approximately 375g
6 eggs
1 heaped teaspoon of baking powder
½ teaspoon of bicarbonate of soda
200g of ground almonds
250g of caster sugar
50g of good quality cocoa
Decoration; Chocolate Buttercream Icing and Terry's Chocolate Orange

Method:
1. Put the oranges whole and unpeeled in a saucepan with cold water and bring to the boil before reducing the heat and simmering for 2 hours, or until soft. Drain the water and set aside to cool. When cool, cut the oranges in half and remove any large pips.
2. Grease a 20cm springform pan and preheat the oven to 180 Celsius (350 Fahrenheit, or gas mark 4).
3. Pulp the orange in a food processor before adding the eggs, baking powder, bicarbonate of soda, almonds, sugar and cocoa and processing until you have a smooth batter, but still flecked with orange.
4. Pour the batter into the springform pan and bake for 1 hour. Check the cake after 45 minutes as you may need to cover it with foil to prevent burning before the cake is cooked through.
5. Let the cake cool in the tin before removing and decorating.

6. Decorate the cake with the chocolate butterceam icing and the chocolate orange on top (aim for one orange segment per slice of cake). The cake can also be decorated with other things.