Air Fryer Crispy Fried Onions.

Equipment

• An air fryer (basket style works best for shaking)
• A mandoline slicer or a very sharp chef’s knife
• A large mixing bowl
• Paper towels
• A cooling rack or a paper-towel-lined plate

Ingredients

• 2 large yellow or white onions (about 1 pound total)
• 1.5 tablespoons neutral cooking oil (avocado oil, canola oil, or vegetable oil work best due to their high smoke points)
• 1.5 tablespoons cornstarch (or rice flour for an extra light crunch)
• ½ teaspoon fine sea salt (plus more to taste after cooking)
• Optional seasonings: ¼ teaspoon garlic powder, ¼ teaspoon smoked paprika, or a pinch of cayenne pepper for a subtle kick.

Instructions

Step 1: Prep and Slice the Onions

1. The key to uniform crispiness is uniform slicing. If some slices are thick and others are paper-thin, the thin ones will burn before the thick ones finish cooking.
2. Cut the top and root ends off the onions, peel off the papery outer layers, and slice them in half from top to bottom.
3. Using a mandoline slicer set to approximately 1/8-inch thickness (about 3mm), slice the onions into half-moons. If you are using a chef’s knife, take your time to ensure your slices are as consistent as possible.
4. Separate the layers of the sliced onions with your fingers so you have a bowl full of individual, thin onion strands.

Step 2: Draw Out Excess Moisture

1. Spread the sliced onions out over a layer of paper towels or a clean kitchen towel.
2. Place another paper towel on top and press down firmly to absorb as much surface moisture as possible. Let them sit for 5 minutes, then pat them dry one more time.

Step 3: Coat and Season

1. Transfer the dried onion strands into a large, dry mixing bowl.
2. Drizzle the neutral cooking oil over the onions. Use your hands to toss them thoroughly, ensuring every single strand is lightly coated in oil. This helps the starch adhere evenly.
3. Sprinkle the cornstarch, sea salt, and any optional spices (like garlic powder or paprika) over the onions.
4. Toss vigorously until the white powder disappears and coats the onions in a very thin, translucent paste.

Step 4: Air Frying with Controlled Intensity

1. Because onions burn easily, you will use a variable temperature technique to first cook off the moisture, and then crisp the exterior.
2. Phase 1: Moisture Evaporation (Low Intensity) Preheat your air fryer to 300°F (150°C) for 3 minutes.
3. Add the coated onions to the air fryer basket. They will look crowded and piled up, which is fine at this stage as they will shrink significantly.
4. Air fry at 300°F (150°C) for 10 minutes . Every 3 minutes, pull the basket out and shake it thoroughly, or use tongs to redistribute the onions so the bottom layers move to the top. By the end of this phase, the onions should be completely wilted, softened, and reduced to about half their original volume.
5. Phase 2: The Crisping Stage (Medium-High Intensity)
6. Increase the air fryer temperature to 350°F (175°C) .
7. Cook for another 10 to 12 minutes , shaking the basket vigorously every 2 minutes.
8. Watch them closely during the final 4 minutes. As the water evaporates, the onions will rapidly turn from pale yellow to golden brown. Remove any clusters that are browning faster than the rest to prevent scorching.

Step 5: Cooling and Final Crisp

1. Once the onions are a deep, uniform golden-amber color, immediately remove them from the air fryer basket. They might still feel slightly soft or pliable right out of the heat; this is normal.
2. Spread them out in a single layer on a plate lined with paper towels or a wire cooling rack.
3. As the air hits them and they cool down (about 3 to 5 minutes), the starch and sugars will harden, creating an incredibly crispy texture. Toss with an extra pinch of salt if desired.

Nutrition

Calories: 55 kcal · Protein: 1g · Fat: 3.5g Saturated Fat: 0.3g · Carbohydrates: 6g Dietary · Saturated Fat: 0.3g · Fiber: 1g · Sugar: 3g · Sodium: 200mg