Start by making your yellow buttercream. Using an electric mixer, beat together butter, icing sugar, milk and food coloring on medium speed. Gradually increase to high.
Frost each cupcake first, by icing a flat circle on each cupcake. Then on top, add a thicker layer of buttercream, but the circle should be smaller in diameter to its base (this is to form the body and head).
With your black fondant, roll out 24 tiny spheres. These will act as your chick’s eyes.