Step-by-Step Instructions

• Preheat your oven to 400 degrees. You want it fully hot before the cheese hits the pan so it starts crisping immediately instead of just melting into a puddle.
• Slice your onions into 1/4-inch-thick rounds. Too thin and they will overcook before the cheese crisps. Too thick and they will stay crunchy-raw in the center while the cheese burns. A quarter inch is the sweet spot. Separate the rings gently but keep the smaller inner rings for snacking or another use since they are harder to work with here.
  2 Medium Yellow Onions
• Line a baking sheet with parchment paper or a silicone mat. This is non-negotiable. Trust me, I’ve learned that the cheese will stick to bare metal and you will lose half your work when you try to peel them off. Spray with a bit of cooking oil.
  Cooking Spray
• Spoon about a heaping tablespoon of shredded Parmesan onto the baking sheet. Spread it into a rough circle that is about the size of your onion slice. Do not pack it down. Let it sit loose so air can circulate and crisp the edges.
  1 1/2 Cups Parmesan Cheese
• Place an onion ring directly on top of the cheese pile. Press it down gently so it makes contact, but do not smash it. You want the cheese to grab the onion, not ooze out from under it.
• Add another heaping tablespoon of cheese on top of the onion. Make sure it connects with the bottom layer of cheese around the edges. This is what creates the sealed shell. If there are gaps, the cheese will not fuse and you will end up with a floppy ring.
• Repeat with the remaining onion slices. Give each pile a little space on the pan so they do not melt into each other. You want individual onion rings, not a cheese-onion casserole.
• Sprinkle the garlic powder, paprika, and salt evenly over the tops. Do this now while the cheese is still loose. Once it melts and re-hardens, seasonings will not stick.
  1 Teaspoon Garlic Powder, 1 Teaspoon Paprika, ¼ Teaspoon Salt
• Bake for 12 to 15 minutes. You are watching for the cheese to fully melt and start browning at the edges. The timing depends on your oven and how thick your cheese layer is, so check at the 12-minute mark. If the cheese is melted but still pale, give it a few more minutes.
• Switch to the broiler on low. This is the move that takes them from good to incredible. Broil for 2 to 4 minutes, watching closely, until the cheese turns deep golden brown with crispy, lacy edges. Do not walk away during this part. The broiler moves fast and the line between perfectly golden and burned is about 30 seconds.
• Let them cool on the pan for at least 5 minutes. This is when the cheese hardens into that crispy shell. If you try to pick them up too soon, they will be floppy and the cheese will tear. Patience here pays off big.
• Use a thin spatula to lift them off the pan. Slide it under gently. If they are fully cooled and crisped, they should release cleanly. If one sticks, let it cool another minute.
• Serve them as is or with your favorite dipping sauce. They are ridiculously good still slightly warm when the cheese is at peak crispness and the onion inside is tender and sweet.