"Sunny Side Up" Cookies

Ingredients

• Cookies

  • 3/4 cup (180 ml) unsalted butter, softened
  • 1 cup (250 ml) sugar
  • 1 egg
  • Grated zest of 1 lemon
  • 2 cups (500 ml) cake flour
  • 1 teaspoon (5 ml) baking powder
  • A pinch of salt

• Icing

  • 4 cups (1 litre) icing sugar
  • 2 egg whites
  • Water, as needed
  • Yellow food coloring