1️⃣ Use Fresh, Firm Onions – Choose large white onions with a firm texture for the best crispy chips. Softer onions can release too much moisture, making them soggy.

2️⃣ Slice Evenly for Consistent Crispiness – Use a sharp knife or mandolin to slice ¼-inch rounds evenly. This ensures they cook at the same rate. Wear a cut-resistant glove for safety when using a mandolin.

3️⃣ Pat Dry for Extra Crispiness – Before layering, pat the onion slices dry with a paper towel. This removes excess moisture and helps them crisp up better.

4️⃣ Shred Your Own Parmesan – Pre-shredded parmesan contains anti-caking agents that can prevent proper melting. Freshly shredded parmesan creates a more even, crispy texture.

5️⃣ Season Between Layers – To get maximum flavor, sprinkle seasonings like garlic powder, smoked paprika, or ranch seasoning between the layers of parmesan cheese and onions.

6️⃣ Bake on Parchment Paper – This prevents sticking and allows the cheese to crisp up properly without burning. A silicone baking mat also works well.

7️⃣ Let Them Cool Completely – Once out of the oven, let the chips cool on the pan for 5-10 minutes. This helps them set and get that perfect crunch.

8️⃣ Best Storage Method – Store leftover onion ring chips in an airtight container at room temperature for up to 2 days or in the fridge for up to 5 days. Use parchment paper between layers to prevent sticking.

9️⃣ Reheating for Crispiness –
🔥 Oven: Preheat to 350°F and bake for 5 minutes.
🔥 Air Fryer: Reheat at 350°F for 3-4 minutes.
🔥 Skillet: Heat over medium heat for a quick crisp refresh.
(⚠ Avoid microwaving, as it makes them soft.)

🔟 Experiment with Cheese Blends – While parmesan is ideal, you can mix in asiago, pecorino romano, or cheddarfor different flavors. Just keep the parmesan as the base for the best crisp!