Air Fryer Copycat French’s Fried Onions

Air Fryer Copycat French’s Fried Onions are crispy, golden, and unbelievably easy — no pot of hot oil required. These homemade fried onions soak in buttermilk, get dredged in seasoned flour, and crisp up in the air fryer in about 10 minutes. They taste better than anything from a can, and they cost a fraction of the price.

If you have ever piled crispy onion straws on a burger or scattered fried onions over a green bean casserole, this is the recipe you have been looking for. Restaurants like Red Robin build entire burgers around crispy onion straws, and now you can make them at home in your air fryer with four simple ingredients.

Love easy copycat recipes made in the air fryer? Try my Copycat A&W Onion Rings, Air Fryer Copycat Burger King Onion Rings, or Air Fryer Beer Battered Onion Rings.

Why You’ll Love Air Fryer French’s Fried Onions

• No deep frying. A light spray of oil replaces four cups of it. No pot to watch, no oil to strain or store, no mess to clean.
• Ready in about 10 minutes of cook time, plus a quick buttermilk soak.
• Better flavor than the can. Paprika and garlic powder in the dredge give these homemade fried onions a warmth that store-bought fried onions simply do not have.
• Cheaper than store-bought. Two small onions and a half cup of flour make a generous batch.
• Easy to make gluten free or dairy free with simple swaps.
• Perfect for burgers and casseroles. These crispy onion straws go on everything from cheeseburgers to green bean casserole.

Ingredients Needed

• Yellow onions – Small yellow onions sliced paper thin. Sweet or white onions also work well. Skip red onions; the color and flavor are wrong here.
• Buttermilk – The soak is what allows the flour to cling to the onions. No buttermilk on hand? Stir a tablespoon of lemon juice or white vinegar into a cup of milk and let it sit for five minutes.
• All purpose flour – The base of the crispy coating. A 1:1 gluten free flour blend works with no other changes.
• Paprika – Adds color and gentle warmth. Smoked paprika is excellent if these are going on a BBQ burger.
• Garlic powder – Savory depth that makes these taste better than store-bought fried onions.
• Kosher salt – Season the flour, then season the onions again the moment they come out of the basket.
• Cooking spray – Essential. Dry flour will not brown, so a light, even coat of oil is what turns these golden.

How To Make Air Fryer Copycat French’s Fried Onions

Step One: Slice the onions thin and short. Slice the onions as thinly as you possibly can, then halve or quarter the rings. Thin slices are what make them crisp instead of soft, and short pieces are what make them look like the fried onions that come out of a can rather than long onion straws. A mandoline makes this quick.

Step Two: Soak the onions in buttermilk for about 10 minutes. This gives the seasoned flour something to grab onto. Ten minutes is plenty; much longer and the onions start to lose their bite.

Step Three: Dredge in seasoned flour. Whisk the flour, salt, paprika, and garlic powder together in a shallow dish. Lift the onions out of the buttermilk a handful at a time, let the excess drip off, and toss them through the flour until coated, separating any clumps with your fingers. Shake off the extra flour.

Step Four: Arrange in a single layer and spray. Spread the coated onions in a single layer in the air fryer basket, working in batches if you need to. Spray lightly and evenly with cooking spray until no dry white flour is visible. This step is what separates golden, crispy fried onions from pale, chalky ones.

Step Five: Air fry at 375 degrees F (190 degrees C) for 10 to 12 minutes, until deep golden brown. Start checking around 8 minutes, since air fryers vary. If you see dry, floury patches partway through, give them another quick spray.

Tip the fried onions out onto a plate, spread them into a single layer, and salt while hot. They crisp up even more as they cool.

Pro Tips For The Crispiest Air Fryer Fried Onions

• Slice as thin as possible. Thickness is the single biggest factor in how crispy your fried onions turn out.
• Never crowd the basket. Overlapping onions steam instead of crisp. Two smaller batches always beat one crowded batch.
• Do not skip the cooking spray. Unsprayed flour stays raw, pale, and chalky.
• Watch the color, not the clock. Fried onions go from golden to bitter fast, and stray bits of loose flour scorch first.
• Spread them out immediately. Left piled in the hot basket, they steam themselves soft within a minute.
• Preheat your air fryer for 3 to 5 minutes so the coating starts crisping the second it goes in.

Recipe Variations

• Gluten free fried onions: Use a 1:1 gluten free flour blend. No other changes needed.
• Dairy free fried onions: Soak the onions in unsweetened plant based milk with a splash of vinegar stirred in.
• Spicy fried onions: Add 1/4 teaspoon cayenne or chili powder to the flour.
• Extra crispy: Replace 1 tablespoon of the flour with cornstarch.
• Smoky BBQ style: Swap smoked paprika for sweet paprika and add a pinch of onion powder.

What To Serve With Crispy Fried Onions

These homemade fried onions started as the topping for a Copycat Red Robin Whiskey River BBQ Burger, and that is still my favorite way to eat them: a cheddar-topped patty, a heavy pour of whiskey BBQ sauce, mayo on the bottom bun, and a generous handful of crispy onions on top.

They are also fantastic:

• Piled onto Air Fryer Burgers or Easy Air Fryer Cheeseburgers
• Layered onto Air Fryer Bacon Burgers for double the crunch
• Scattered over green bean casserole, where they crisp right back up in the oven
• Spooned over mashed potatoes, mac and cheese, or a loaded baked potato
• Sprinkled on chili, tomato soup, or a salad in place of croutons
• Eaten straight off the plate, standing at the counter

How To Store And Reheat

Storing: Let the fried onions cool completely before storing, since any trapped warmth turns to steam and softens them. Store in an airtight container at room temperature for up to 3 days.

Reheating: Air fry at 350 degrees F for 2 to 3 minutes to bring the crunch back, or bake at 375 degrees F for about 5 minutes. Fried onions going on top of a casserole will re-crisp in the oven on their own.

Freezing: Not recommended. The coating softens on thawing and never fully recovers.

Frequently Asked Questions

Do I have to soak the onions in buttermilk? Yes. Dry onions and dry flour have nothing to bind them together. The buttermilk soak is what gives you a real crispy coating instead of a light dusting of flour.

Can I use regular milk instead of buttermilk? Yes. Stir a tablespoon of lemon juice or white vinegar into a cup of milk and let it sit for five minutes before using.

Why are my air fryer fried onions pale and floury? They did not get enough cooking spray, or the basket was too full. Spray again partway through cooking and work in smaller batches.

Do I need to shake the basket? Not if the onions are in a true single layer. If they overlap at all, give the basket a gentle shake at the halfway mark.

How do these compare to deep fried onions? Very close. Air fryer fried onions are slightly less rich and a bit more varied piece to piece, but they are just as crispy and far less work.

What kind of onions are best for fried onions? Small yellow onions are ideal. Sweet and white onions also work. Red onions are not a good choice here.

Can I make these ahead of time? Yes. Cool completely, store airtight for up to 3 days, and re-crisp in the air fryer for 2 to 3 minutes before serving.

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