What do you recommend? For olive oil, we usually just buy anything from Italy or Portugal and it's acceptable to excellent. The last time we went shopping, though, it was at Target and all they had was California olive oil and it is definitely lacking that special southern Mediterranean flavor. For truffle-infused oil, I haven't a clue. But we had some the other day at my brother's place and it was awesome. I understand, though, that there are at least two kinds of truffles, white and black (with most preferring the less common white), and that in many in not most of what's labeled "truffle oil" there are actually no truffles at all, only truffle-like artificial chemicals (ala substituting vanillin for real vanilla).