Preheat the oven to 180 ° C and line the muffin tin with paper liners. Mix the butter and sugar until creamy and slowly add the flour. Stir in half of the milk (120 ml).
In a second bowl, stir together the eggs, vanilla powder, baking powder, salt and the rest of the milk until frothy. Then stir the flour mixture into the dough until it becomes a smooth mass. Maybe add food coloring or syrup if you want a colorful batter. Now fill the molds with 2/3 batter and bake for about 20 minutes.
For the frosting, beat the butter on a medium heat until creamy. Then add the marshmellow cream. When everything is well mixed, stir in the sugar and vanilla powder. Add a dash of syrup or food coloring.
Continue stirring at the highest level for 3 - 4 minutes until it is a loose mixture. When the muffins have cooled, sprinkle with the frosting and decorate.