Mix the ingredients together. Pour the batter into a piping bag or freezer bag and fill the molds. The paper cases should not touch each other on the baking sheet.
Bake at 190 ° C in a preheated oven for about 12 minutes.
Mix powdered sugar with two tablespoons of hot water. Fill into four bowls and mix with a drop of food coloring from the tube.
Place on the still warm muffins and decorate them.