Ingredients

  • 9/16 cup butter very soft
  • 1 cup sugar
  • 6 egg yolks
  • 1 1/2 cups dark chocolate e.g. Valrhona
  • 1/2 cup espresso strong
  • 6 egg whites stiff
  • 1 rum
  • 1 cointreau optional
  • creme fraiche to serve

Method

  • Beat butter until fluffy, add sugar, then egg yolks one by one. Mix for 20 minutes.
  • Melt chocolate with espresso in a bain-marie, let cool. Add chocolate to butter mixture, then add rum (and Cointreau).
  • Carefully fold in stiff egg whites.
  • Pour the mixture into a buttered 28 cm diameter cake pan and bake at 180 °C for 30 minutes.
  • Let cake cool, then wrap it tightly in plastic wrap and put it into the fridge for 3 days (this is necessary for the cake to become thoroughly moist, it's worth the wait).
  • Take out of the fridge 30 minutes before serving. Sprinkle with powdered sugar and serve with a dollop of creme fraiche.