Preheat oven to 150°C.
Place butter in a mixing bowl, mix with hand mixer until light and fluffy.
Add in icing sugar and mix well.
Add in egg yolk one at a time, mix well.
Divide milk into 3 batches, add into the dough one batch at a time.
Sift Dr. Oetker Nona Corn Starch and milk powder into the mixture, mix well with spatula.
Place the dough into piping bag, use mini star nozzel to pipe S shape.
Bake at 150°C for 8 minutes. Dip a toothpick into Dr. Oetker Nona Red Rose Colour to decorate the eyes.