Are we still talking about the fun kind (fungi) or the little chocolate things?

Truffles are also a sort of non-hallucinogenic fungi, prized as a seasoning for certain foods, typically dug up and harvested by truffle hunters aided by dogs or pigs. I suspect they're the ones you get as European, unless you're talking about the chocolates.

In fact, the work truffle refers to too many different things. Someone should do something about that.