Gravy

Gravy is a sauce made from the juices of meats or vegetables that is enjoyed by both humans and Smurfs. In mainstream Smurfs media, the evil wizard Radnia used wolf gravy to turn Peewit into a werewolf.

Empath: The Luckiest Smurf stories
Gravy in the EMPATH: The Luckiest Smurf story series is made by Culinary Smurf using vegetables and is often used as a topping for mashed potatoes.