A Plate of Soil with Engine Oil

2. Preheat the oven to 180C/350F/gas mark 4.

3. Mix the flour and the first amount of sugar (150g) with half the cocoa powder.

4. Beat in the milk and melted butter.

5. Break the chocolate into rough pieces and stir into the mixture.

6. Pour into the loaf tin.

7. Sprinkle the second amount of sugar (55g) and the other half of the cocoa powder over the mixture.

8. Pour hot milk over it, place the loaf tin in a shallow roasting tin and bake for 1 hour 15 minutes. It is ready when the top feels crusty.

9. Carefully turn the whole thing out into a deep serving dish and eat it with cream while still hot.

NB. You can replace the dark chocolate with white chocolate if you prefer, or do a mixture of the two.

With thanks to The Roald Dahl Foundation