Fairtrade chocolate and banana crêpe cake

Method

1. For the crêpes, sift the flour and cocoa into a bowl and stir in the sugar
2. Make a well in the middle then add the beaten egg
3. Whisk to combine, then slowly whisk in the milk and butter
4. Leave to rest for 30 mins
5. Meanwhile, make the banana cream
6. Heat the milk until it just starts to boil. In a bowl, whisk the yolks, sugar, cornflour and flour together
7. Slowly whisk in the hot milk, then return the mixture to the pan
8. Whisk over a medium heat until thick and glossy, then leave to cool completely
9. Whip the cream into soft peaks, then fold it through the cooled custard, along with the banana. Chill, covered with cling film, for at least 30 mins
10. While it’s chilling, fry the crêpes
11. Brush a 24cm nonstick frying pan with oil and warm over a medium heat Add about 50ml batter and swirl the pan to coat the base. Cook for 1-2 mins, until the crêpe is dry on top, then flip over and cook for 30 seconds
12. Transfer to greaseproof paper and repeat to make 25 crêpes, stacking them with greaseproof paper in between
13. Break the chocolate for the ganache into a bowl
14. In a pan, bring the cream to a simmer, without boiling, then pour over the chocolate. Leave for 30 seconds, then stir until smooth, thick and glossy
15. Allow to cool fully
16. To assemble the cake, put a crêpe on a serving plate
17. Spread over 1 heaped tablespoon of the banana cream and top with another crêpe
18. Repeat for all the crêpes, then chill until firm
19. Using a palette knife, cover the top and sides with the ganache
20. Shave the chocolate into curls with a potato peeler, then use to decorate the cake
21. Dust with cocoa and chill until needed