1. Preheat the oven to 210°C (th7)
2. Beat the egg yolks with 150 grams of sugar
3. Add softened butter
4. Beat the egg whites until stiff peaks form
5. Gently fold the egg yolk mixture, flour, and baking powder into the beaten egg whites
6. Bake for 20 minutes at 210°C (th7), then 10 minutes at 180°C (th6)
7. Prepare a syrup with 1 liter of water and 150 grams of sugar. At the end of cooking, add 10 tablespoons of dark rum.
8. Once the cake is out of the oven, remove it from the mold. Gradually pour the hot syrup over the cake. Regularly during the cooling time, soak the cake with the syrup that has not been absorbed.
9. Before serving, whip the heavy cream with powdered sugar until stiff peaks form.
Tip for successful whipped cream: Place the beaters and the mixing bowl in the freezer for at least 1 hour. The cream should also be very cold.