Mix flour and baking powder. Whisk the egg. Stir in sugar, vanilla sugar, salt, butter and 250 ml buttermilk. Carefully fold in the flour mixture. Line a muffin tray (12 trays) with paper cups. Spread the dough in it
Bake in the preheated oven (electric cooker: 175 °C/ convection oven: 150 °C/ gas: level 2) for approx. 25 minutes. Let muffins rest for about 5 minutes. Carefully remove from the tray. Let them cool down
Mix beetroot juice, lemon juice and icing sugar with the whisk of the hand mixer. Spread the icing on the muffins with a tablespoon
Waiting time approx. 1 hour