Pooka nut

A pooka nut is a special type of edible nut that grows in the Smurf Forest.

Mainstream Smurfs Media
The pooka nut appears in the cartoon show episode "Reckless Smurfs" when Greedy was making a batch of pooka nut icing in his kitchen. As it turned out, pooka nut icing acts as an antidote for Gargamel's Daredevil Dust, which he sprayed over the Smurf Village to make the Smurfs act so reckless as to endanger themselves by heading straight for Gargamel's house.