Lindsay
This is an absolutely delicious recipe that makes great fluffy pancakes.  I followed the recipe EXACTLY.  You can, if you want more protein, add another egg without messing up the recipe, but not necessary.   However, in order to make them fluffy you should do the following:  sift flour and then mix them together gently.  Don't add all the ingredients and then let it sit, bubble, and THEN mix it.  All the bubbles created from the baking powder will pop and your pancakes will not be as fluffy. (learned from experience)