Preheat the oven at 180 degrees Celsius.
Start with the dough for the hearts by whipping the egg yellows. Add the flour, baking powder, sugar, soft margarine, and the fruit juice and mix well.
Whip the egg whites to a hard foam.
Mix gently the egg whites in the dough batter.
Place a baking paper in a baking form and pour the batter on.
Place the cake in the middle of the oven for 20 minutes. The cake should be very soft.
Take out the cake and let it cool down.
With a heart shaped cookie cutter make as many hearts as the rectangular baking form for the rest of the cake.
Preheat the oven at 180 degrees Celsius.
Time to make vanilla cake by whipping the egg yellows. Add the flour, vanilla sugar, baking powder, sugar, milk and margarine. Mix well.
Whip the egg whites to a hard foam and gently mix with the batter.
Butter the rectangular baking form.
Pour some of the cake batter in the bottom.
Place the hearts tight together on the vanilla base. Continue to pour the vanilla batter so it covers the hearts.
Place in the middle of the oven for 40 minutes. Take the cake out and let it cool down.