introduction

This recipe makes crunchy, low-carb onion rings using only Parmesan cheese as the crust. They bake in the oven for a light, crispy bite that fits a keto way of eating. If you like easy snacks, this is fast to make. For another simple baked dessert idea, see this baked apple crumble recipe.

why make this recipe

Make these rings when you want a crunchy snack without breading or deep frying. They take little time and use few ingredients. The cheese crisps up golden and holds each onion ring. This keeps carbs low and flavor high.

how to make Baked Parmesan Onion Rings (Keto-Friendly & Ultra-Crispy)

You will shape the Parmesan on the sheet, add the onion ring, top with more cheese, season, and bake. Let them cool on the sheet so the cheese sets and becomes extra crisp.

Ingredients :

2 medium white onions, sliced into ¼‑inch thick rings
2 cups shredded Parmesan cheese
Salt, to taste
Garlic powder, to taste
Paprika, to taste
Optional: Italian seasoning, to taste
Optional: Olive oil, for brushing

Directions :

Preheat oven to 400 °F (200 °C) and line a baking sheet with parchment paper.
Peel and slice onions into ¼‑inch thick rounds.
For each ring, place about 1 tablespoon of shredded Parmesan onto the parchment and press into a flat circle slightly wider than the onion.
Place an onion ring on each Parmesan circle.
Top each ring with another tablespoon of Parmesan; press gently with a spoon to adhere.
Season each with salt, garlic powder, and paprika (and Italian seasoning if using).
Optionally brush with a little olive oil for extra browning.
Bake 15–20 minutes, until cheese is deep golden brown and crispy.
Let cool on the baking sheet for 10–15 minutes before serving to maximize crunch.

how to serve Baked Parmesan Onion Rings (Keto-Friendly & Ultra-Crispy)

Serve warm as a snack or side. They pair well with ranch, sugar-free ketchup, aioli, or a hot dipping sauce. Place on a paper towel if you spot small oil drips, then transfer to a plate.

how to store Baked Parmesan Onion Rings (Keto-Friendly & Ultra-Crispy)

Store cooled rings in an airtight container at room temperature for up to 1 day. Re-crisp in a 350 °F (180 °C) oven for 5–7 minutes. Do not keep them in a sealed fridge for long — moisture makes them soft.

tips to make Baked Parmesan Onion Rings (Keto-Friendly & Ultra-Crispy)

Use thinly shredded Parmesan, not powdered. It melts and crisps better.
Press the cheese well so it forms a tight cup around the onion.
Let the rings cool fully on the sheet; the cheese firms as it cools.
Do not stack rings while hot; they stick and lose crunch.
If you like extra color, brush lightly with olive oil before baking.

variation (if any)

Add spices like smoked paprika or cayenne for heat.
Swap white onion for yellow or sweet onion for milder flavor.
Mix in a tablespoon of grated Parmesan with 1 teaspoon grated cheddar for a different taste.

FAQs

Q: Can I use pre-shredded Parmesan?
A: Yes, but fresh shredded Parmesan melts and crisps best.

Q: Will this work with other cheeses?
A: Some cheeses work, like cheddar or Asiago, but melting and texture change. Parmesan is the crispest.

Q: Can I air fry these instead of baking?
A: Yes. Air fry at 375 °F (190 °C) for about 8–12 minutes, watch for browning.

Q: How do I keep them from sticking to the parchment?
A: Press the cheese flat and let it set in the oven; cooled cheese should lift easily. Use silicone mat if needed.

Conclusion

For another crunchy, low-carb onion ring idea and inspiration, check this Kirbie’s two-ingredient crispy keto onion rings.