SERVES 10-12

For the cake

100g dark chocolate

150g unsalted butter

50ml vegetable oil

60g golden syrup

3 large free-range eggs

50g plain yoghurt

80ml semi-skimmed milk

250g self-raising flour plus ½ tsp baking powder

25g cocoa powder

1 tsp Maldon sea salt, finely ground

150g light muscovado sugar

For the filling

125g raisins

1 cinnamon stick

½ vanilla pod, split and seeds scraped out

1cm piece of root ginger, peeled

water to cover

50g light muscovado sugar

150g mascarpone

For the ganache topping

100g good-quality milk chocolate, broken into small pieces

80ml double cream

1. Preheat the oven to 160°C.

2. For the cake, melt the chocolate, butter, oil and syrup together in a large bowl, either on a low setting in the microwave or over a pan of simmering water. Combine the eggs, yoghurt and milk, beating together well. Sift the flour, baking powder, cocoa and salt together and rub through the sugar, making sure to remove any lumps. Mix the egg mix into the chocolate mix, then make a well in the flour mix and add the egg/chocolate mix, using a whisk to make sure everything is completely combined.

3. Pour into a greased and lined 20cm loose-bottomed cake tin and bake for 60–70 minutes (check after 30 minutes and cover with foil if it is starting to get too dark). The cake should be well risen, may have some cracking and a skewer will come out virtually clean.

4. Allow to cool for 10 minutes in the tin, then remove and wrap in cling film while still hot. This helps to keep the cake moist. Place on a wire rack to cool completely.

5. To make the filling, place the raisins, cinnamon, vanilla and ginger in a small pan and just cover with water. Bring to the boil and then simmer until the liquid has completely evaporated. Tip onto a plate, discard the vanilla and cinnamon and chill. Beat the muscovado into the mascarpone and allow to stand for 15 minutes. Beat again and check the sugar has dissolved. Fold in the cold raisins and grate in the piece of ginger from the pan using a fine grater. Mix well.

6. For the topping, heat the cream to simmering point in a pan, pour the chocolate over it and let it sit for 5 minutes. Use a small whisk to emulsify the cream and chocolate together. Press cling film directly onto the surface and allow to cool.

7. To assemble, split the cake in half and trim the top if it is really uneven. Fill with the mascarpone and raisin mix and then coat the top with the ganache. Shave some chocolate curls over the top using a potato peeler if desired.