Line the recesses of a muffin tin (for 12 pieces) with paper cups. Cream butter, sugar, 2 packets of vanilla sugar, lemon zest and 1 pinch of salt. Stir in the eggs one by one. Mix flour and baking powder and stir in briefly, alternating with yoghurt and lemon juice.
Spread the dough into the moulds. Bake in the preheated oven (electric cooker: 200 °C/circulating air: 175 °C/gas: level 3) for approx. 25 minutes. Let them cool down.
For the marzipan chicks, knead the almond paste and 2 tablespoons (20 g) icing sugar with your hands. Colour a hazelnut-sized piece (approx. 3 g) pink with red food colouring. Colour the rest with yellow food colouring. Form yellow marzipan into a roll (approx. 36 cm long), cut into 36 slices and use them to make eggs. Form pink marzipan into a roll (approx. 18 cm long) and cut into 36 pieces. Make little balls out of it, put them as beaks on the chicks and press them in the middle with a wooden skewer. Paint the chicks with brown sugar writing (tube).
Roast the grated coconut without fat and let it cool down. Whip the cream until stiff and pour in 2 sachets of vanilla sugar and cream firming agent. Pour into a piping bag with a large star-shaped spout and squirt as nests on the muffins.
Sprinkle with coconut shavings. Place 3 small chicks in the middle of each.