I quickly found out once I started cookie decorating, that drawing with a pencil and piping with icing are two very different worlds!
Even though these worlds are far apart, if we look at the simplicity of a drawing, we can transfer a lot of the main "emotion" to a cookie.
Understanding the "main" things to look for in expressions, can help when you are designing your characters cookies. I made a little video of me explaining some of these things in very basic terms. So please go easy on me!
Have a look here while I draw these silly Leprechaun faces!
Or click the arrow to watch here: