In this video, you’ll learn how to make crispy, crunchy onion rings. These may be the best onion rings you’ll ever eat. Chef John’s secret ingredient is instant mashed potatoes! The other secret ingredient? Panko bread crumbs. See which kinds of onions are the best for making onion rings and how wide to cut the rings. You’ll also see a trick for keeping your batter from getting goopy. Of course, the real test of onion rings is do they stay crunchy over time? These super-crispy onion rings sure do. Even after 15 minutes, they cling to their wicked crunch. Check out Chef John's recipe for Crispy Onion Rings. There's no end to the crunch!