Of all the cheeses in the land, Parmesan might just be our favorite. After all, it makes some sort of appearance in so many of our favorite recipes, especially the ones of an Italian or other pasta-based variety. Still, we’ve never given much thought to just why and how it tastes the best— but it turns out we should! If you’ve ever walked up to a cheese counter and felt overwhelmed, or if you’ve simply wondered how to get the best bang for your buck, you’ll want to watch America’s Test Kitchen explain just which part of a Parmesan cheese wheel is the best, what to look for when you buy it, and the science behind it all.