Drain the cherries well in a sieve. Cut 300 g of room warm butter into pieces. Cream butter, 250 g sugar and vanillin sugar with the whisk of the hand mixer. Stir in 5 eggs individually. Mix 375 g flour, almonds and baking powder and stir in alternately with milk. Fill the dough and cherries alternately into a greased and floured heart shape (2.5 litres capacity). Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for 45-55 minutes (stick test).
Cut 100 g butter into pieces. Separate 1 egg. Knead 200 g flour, 70 g sugar, butter and egg yolk first with the dough hooks of the hand mixer, then with your hands to a smooth dough. Wrap the dough in foil and chill for about 30 minutes.
Take the cake out of the oven and let it cool down for 10 minutes. Roll out half of the shortcrust pastry on a floured work surface 1-2 mm thin. Cut out large and small hearts. Knead dough sections again, roll out and cut out. Place hearts on 1-2 baking trays lined with baking paper and bake in the preheated oven (electric range: 200 °C/ convection oven: 175 °C/ gas: level 3) for 8-10 minutes one after the other. Use the rest of the dough for other purposes (keeps in the refrigerator for a few days). Then place on a cake rack and let it cool down.
Mix icing sugar and egg white and cut in half. Colour one half pink. Pour the icing into a piping bag/freezer bag and cut off a small corner. Decorate cookies with icing, label them if necessary and let them dry. Coarsely chop the chocolate coating. Melt the couverture and coconut oil in a bowl on a warm water bath. Cover cooled cake with couverture so that it runs down the sides. Put the cake in a cold place. As soon as the couverture becomes firm, decorate the surface with hearts. Turn on the remaining candles