Most of us have a staple cooking grease—whether olive oil, canola oil or just plain butter—that we use on a regular basis, but it’s always good to know what the best (and healthiest) cooking options are. Most research shows that, if used in moderation, oil, butter and margarine aren’t completely unfriendly towards most diets. However, there are slight differences in intended use and good vs. bad fat content. Below, get the basics for your next pan-handling adventure in the kitchen.