Parmesan-Crusted Onion Rings
A crispy, savory keto snack made with thinly sliced onions and melted parmesan, baked to golden perfection. This keto-inspired keto (keto) ready in about 26 minutes pairs large onions, parmesan cheese, olive oil for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 140 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 2 large onions
- 1/4 cup parmesan cheese
- 1 tbsp olive oil
Instructions
- Step 1: Slice onions into 1/4-inch thick rings, discarding the tough root ends.
- Step 2: Toss onion rings with 1 tbsp olive oil in a bowl until evenly moistened.
- Step 3: Sprinkle 1/4 cup grated parmesan cheese over the onions and toss gently to coat all pieces.
- Step 4: Arrange rings in a single layer in the air fryer basket, ensuring no overlapping.
- Step 5: Air fry at 375°F for 10 minutes, then shake the basket gently and cook 6 more minutes until edges are deeply golden and crisp to the touch.
- Step 6: Transfer to a paper towel-lined plate immediately to absorb excess oil and prevent sogginess.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Parmesan-Crusted Onion Rings take to make?
Total time is about 26 minutes (10 min prep + 16 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Parmesan-Crusted Onion Rings?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep large onions from drying out.
Can I substitute ingredients in Parmesan-Crusted Onion Rings?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Parmesan-Crusted Onion Rings for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
Is Parmesan-Crusted Onion Rings keto?
Yes — this recipe is tagged keto based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
What others are saying
- ★★★★★
Kids gobbled it up without complaints — that's a 5-star in my book.
- ★★★★★
Simple and delicious.
- ★★★★☆
Good flavors but the sauce was a bit thin. I'd reduce it longer.
