Place the paper baking cups in the wells of a muffin tray (12 wells) and preheat the oven (electric oven: 175 °C/circulating air: 150 °C/gas: see manufacturer).
Mix flour and baking powder. Whisk the eggs in a mixing bowl. Add sugar, vanilla sugar, 1 pinch of salt, milk, oil, lemon juice and zest and mix. Stir in the flour mixture briefly. Spread the dough into the moulds.
Bake in a hot oven for about 20 minutes. Let the muffins cool down.
For the Frosting Jelly, pass through a fine sieve. Whisk butter and icing sugar with the whisk of the mixer for 15-20 minutes until thick and creamy white. Stir in several small portions of jelly, making sure that butter and jelly are at the same temperature.
Possibly at the end colour the cream even more pink with a few drops of food colouring.
Pour Frosting into a piping bag and spray small jagged tuffs onto the muffins. Decorate with sugar beads and chill for about 1 hour.