The Sassy People are made out of pizza. They are expert pizza makers and own Pizza Sassy's, a pizza parlor in the Candy Kingdom. Some of the people from the Institute of So Und appear to be Pizza People and own a restaurant called Pizza Sassy's.
Their faces are made of cheese, presumably with tomato sauce underneath, lined with pizza crust. Many Sassy People who work at Pizza Sassy's wear a green sweater with a pizza logo on the top left.