Put flour, baking powder, sugar, egg, lemon zest and salt into a mixing bowl. Dice cold butter, add and knead to a smooth short pastry. Wrap in foil and chill for about 30 minutes. Roll out the dough on a floured work surface and cut out about 45 biscuits (10 eggs: 5 x 7 cm, 12 chicks: 4 x 7 cm, 8 flowers: 5 x 8 cm, 8 sheep: 5 x 7.5 cm, 7 rabbits: 8 x 3.5 cm). Spread on 2-3 baking trays lined with baking paper and bake in the preheated oven (electric cooker: 200 °C/ convection oven: 175 °C gas: level 3) one after the other for about 8 minutes. Let them cool down.
Mix icing sugar, lemon juice and 1-2 tbsp. warm water to a thick, smooth glaze. Fifth the icing and colour in pink, yellow, light blue and light green. Leave 1 part white. Put some of the icing in each freezer bag and cut off 1 small corner. Paint each biscuit with one icing colour, let it dry a little, then decorate with a different coloured icing, sugar flowers, hearts and pearls.
Waiting time approx. 30 minutes