Surprise cake

Batter

1. 1 Prepare the batter. Beat the butter with the sugar and the egg yolks.
2. 2 Sift the dry ingredients together. Gradually add them to the batter, alternating with 3/4 cup of sugar, beating constantly. Beat the egg whites until stiff and gently fold them into the batter.
3. 3 Grease a round pan (22 centimeters in diameter) and pour in the batter. Bake for 40 minutes in a moderate oven.
4. 4 Let it cool and unmold. Cut a slice (not too thick) from the cake and set it aside. Hollow out the center, leaving the walls all around.

Filling

1. 5 Mix the condensed milk with the orange juice. Add the cream and beat well. Add the crumbled cake center and, last, the beaten egg whites.
2. 6 Fill the hollowed-out part of the cake with this filling and put back the reserved slice.

Frosting

1. 7 Heat the cream in a double boiler without letting it boil. Chop the chocolate and mix it in well with a spatula until you get a smooth cream.
2. 8 Cover the cake by spreading the frosting well. Decorate with chantilly and the chocolate shavings.