From Webkinz Insider Wiki
Grufflegoop is an unsolved Mega Stove recipe.
It was released on February 17, 2010, along with four other recipes: Brisked Triflador, Laphabet Oops, Nonano Pomano, and Yibbles. Webkinzs News gave us two hints to make this recipe. The First clue is you'd be crazy not to use this. The Second Clue said this could get you into a sticky situation.