Chocolate royal gateau

Chocolate royal gateau
Makes: 6-8 portions
Prep time:
Cook time:
Total time:
Sponge base
  • 2 egg whites
  • 18 gr sugar
  • 2 egg yolks
  • 32 gr white sugar
  • 40 gr flour
  • 10 gr corn flour
  • 1 gr salt
Crunchy layer
  • 100 gr cookies
  • 25 gr pure or milk chocolate
  • 40 gr chocolate spread
Chocolate mousse
  • 165 gr pure chocolate
  • 4 egg yolks
  • 40 gr white sugar
  • 26 gr water
  • 240 gr double cream
Sponge base
  1. Preheat the oven to 180 °C and line the tray with baking paper. Whisk in a clean and fat-free bowl the egg whites to stiff peaks adding their sugar gradually. Whisk in another bowl the egg yolks and their sugar until pale and fluffy. Mix and sieve the flour and corn flour and salt.
  2. Fold gradually and carefully first the egg yolks into the egg whites and then the flours and salt. Spread on the prepared tray about a cm thick and bake at 180 °C for 10 min or until golden brown and fully cooked. Remove from the tin on a rack, and allow to cool.
Crunchy layer
  1. Crumble the cookies of your choice. Melt the chocolate and chocolate spread in a bowl over a pot with hot water (au bain marie). Mix in the cookie crumble.
  2. Cut out the sponge a disc that fits snugly in the springform pan to make the base layer. Spread the crunchy cookie mix evenly on top, about half a centimetre thick, and reserve in the fridge until later.
Chocolate mousse.
  1. Melt the chocolate in a bowl over a pot with hot water (au bain marie).
  2. Mix in a pan the sugar and water and bring up to 118°C.
  3. Meanwhile, beat the egg yolks until pale and fluffy, using an electric hand held mixer.
  4. Pour the hot sugar syrup gradually on the eggs yolks whilst mixing until the egg yolks have become light and fluffy and they are back at room temperature again. They should double in volume. Mix with the warm, melted chocolate until combined.
  5. Whip the cold double cream until soft peaks form and mix with the chocolate. Pour the mousse on top of the cookie layer and allow to set overnight in the fridge.
  1. Remove the ring and decorate the gateau as you wish with, for instance, a dusting of cacao powder, grated white chocolate or grated pure chocolate.
Stuff to know
This recipe will fill a springform measuring 18 cm in diameter and yields about 6-8 portions.
In order to be able to whisk the egg whites, there can´t be any trace of egg yolk or grease in the bowl.
To make serving easier, place some plastic strips or baking paper on the inside of the springform ring.
It is possible to freeze the gateau for later use.
The egg yolks in this recipe are no longer raw but cooked in the pâte à bombe and safe to eat.