Peel and quarter the apple, remove the core and cut the apple into small pieces. Grate the carrots.
Beat the eggs with the sugar until frothy. Stir in butter and buttermilk. Add the flour, baking powder, almonds and salt and mix everything together to form a smooth dough. Finally fold in the carrots and apple pieces.
Line a muffin tin with paper liners. Pour the dough into the molds and bake in the preheated oven for about 25 minutes on the middle rack at 160 ° C hot air.
For the topping, mix powdered sugar with water. Cover the cooled muffins with it and decorate with a marzipan carrot if you like.