Crispy Frizzled Onions from Scratch
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In the mood for something crunchy, salty, and totally addictive? These crispy frizzled onions are unbelievably good! Made from scratch with just a handful of ingredients, they’re perfect on top of burgers, salads, and more. Or, serve them with aioli for an easy, crowd-pleasing appetizer!

While shoving a generous handful of fried onions into my mouth this afternoon, I suddenly had a recovered memory of doing the exact thing as a 7 year old, except it was a plastic container of French’s fried onions. (Never mind that you probably couldn’t have paid me $100 to eat a non-fried onion at that age.)
Anyways, if you’ve been here for a while, you may know that I put crispy fried shallots on just about everything. But, there’s a time and a place for a shoestring onion, and that time is today.
They’re crunchy, have a lovely spice, and they go on just about everything from sandwiches to salads to just eating them fresh out of the pan while you burn your fingers. (Not that I’ve ever done that before or anything.)
And, when I was in culinary school, I learned that fried onions are basically the easiest way to elevate a dish ASAP – it totally works. If I see a dish with fried onions on the menu, there is about a 99% chance I will order it.
My favorite way to serve these onions is on top of Dr. Pepper pulled pork, tender reverse sear filet mignon, these garlicky tri-tip sandwiches, or my summery BBQ bacon blue cheese burgers. But of course, they’re a fun appetizer for dinner parties or game nights too! And the best part? We’re shallow frying the onions – absolutely no deep frying required.
5 simple ingredients
My favorite onions in this recipe is sweet onions like Vidalia, Walla Walla, etc. because they’re less strong than other types. But you can also use red, white, or yellow onions. To marinate the onions, you’ll want some whole buttermilk. It takes out some of the bite and makes them more tender.
For the batter, you just need flour, garlic powder, onion powder, paprika, cayenne, salt, and pepper. Of course, feel free to swap the spices for Cajun seasoning or other spices! You’ll also need neutral oil for frying.
If you don’t want to buy buttermilk, here’s a little hack. Add 2 cups (480 milliliters) of whole milk to a measuring cup and remove 2 Tablespoons (30 milliliters). Add 2 Tablespoons (30 milliliters) of white vinegar or apple cider vinegar, whisk, & let it sit until it’s curdled, about 10 minutes. Voilà!
Slice the onions
Marinate & dredge
Fry the onions
Take the onions out when they’re a medium golden-brown. They will continue to fry and crisp up when you take them out of the oil. I also found when I was testing this recipe that frying the onions one small ‘handful’ at a time helps them cook evenly!
Freezer friendly
You can freeze the leftover onions! I like making a big batch and freezing them for later so I always have crispy onions on hand for sandwiches. Just spread the onions on a sheet pan and freeze until solid, about 1 hour. Transfer the frozen onion strings into an airtight container and freeze for up to 2 months.
Refrigerating leftovers
You can also store them in the fridge by placing the onions in an airtight container and refrigerating for 3-4 days. Just a head’s up that they will get a bit soggy in the fridge, but no worries! You can easily crisp them right up in the air fryer or oven.
Reheating the onions
- Air fryer – If you have an air fryer, that’s my favorite way to reheat the onions! Just place the leftover onions in a single layer in the air fryer. Cook them at 360°F (182°C) for 3-5 minutes, tossing them halfway through.
- Oven – To reheat the onions in the oven, preheat the oven to 350°F (177°C). Place the onions on a sheet pan and bake for 10-15 minutes until crispy, stirring every few minutes to prevent burning.
- Frozen – If you’re reheating them from frozen, you can use either the air fryer or oven method. Just add 1-2 extra minutes to the cook time!
Oil temp
I’ve tested this recipe many times and oil temp is key! Frying the onions in oil that isn’t hot enough will make them soggy and taste like oil. But, frying the onions in oil that’s too hot will burn the breading without cooking the raw onions inside. Keep the oil between 350-375°F (177-191°C) for light and crispy onions!
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Crispy Frizzled Onions from Scratch
Ingredients
- 1.75 pounds sweet onions (about 2 large onions)
- 2 cups buttermilk
- 2 cups all-purpose flour
- 1 1/2 teaspoons garlic powder
- 1 1/2 teaspoons onion powder
- 1 teaspoon paprika
- 1/4 teaspoon cayenne
- 1 teaspoon Kosher salt, plus more for sprinkling
- Black pepper, to taste
- Canola or vegetable oil, for frying
Equipment
- Mandoline
- 12'' skillet or heavy-bottom pot
- Candy thermometer
- Tongs
Instructions
- Peel the onions and slice them in half, leaving the root intact. Use a mandoline to cut the onions into 1/8'' slices. Place the onion slices into a shallow bowl.
- Pour the buttermilk over the top of the onions. Use tongs to make sure the onions are covered by the buttermilk as much as possible. Marinate the onions for at least 15 minutes, but preferably 1 hour. Stir the onions every once in a while to make sure they all get marinated.
- While the onions marinate, whisk the flour, garlic powder, onion powder, paprika, cayenne, salt, and pepper in a shallow bowl.
- Pour the oil into a 12'' skillet or heavy-bottom pot. Heat the oil over medium until it reaches 350-375°F. Then, place a few paper towels on a large plate and set aside.
- Once the oil is hot, use tongs to grab a handful of onions from the buttermilk, letting the excess drip off. Dredge the onions in the flour mixture, tapping off any extra flour.
- Carefully transfer the onions into the hot oil. Fry for 2-3 minutes until the onions are golden-brown. While the onions cook, use tongs to occasionally stir the onions and break them apart.
- Once the onions are golden-brown, transfer them to the paper towel-lined plate. Sprinkle them with Kosher salt, to taste. Repeat with the remaining onions. Enjoy them immediately as an appetizer or use them on sandwiches, salads, and more!
I love recipes like this that make me realize that I can make restaurant favorites at home. What a revelation! I used the recipe loosely, tossing together the flour ingredients without measuring, and simply added a little apple cider vinegar to 2 percent milk because it was all I had. I only made a small batch of onions and cooked them in a small pan. I used a fork instead of tongs and eyeballed the oil temp. Your advice to transfer the onions out of the pan as soon as they get golden was super helpful—you’re right—they do keep cooking! Topped them over burgers and *chef’s kiss*, delish and just like you get in a restaurant! Thank you, this easy recipe is going into my rotation! 🙂
Thanks so much, Patricia! I’m so glad you liked this recipe. 🙂 I love when I can make restaurant food at home!
These frizzled onions look amazing — I love how golden and light they turn out! They’d be perfect on just about anything. I’ve been pairing crispy toppings like these with bold, citrusy sauces lately. Tried one with lemongrass and chili from Mekhala recently, and it added such a fun twist. Curious what kinds of flavor combos you like with frizzled onions?
Ooooh, that lemongrass + chili sauce sounds amazing! I really like the frizzled onions with BBQ, but I think it would also be great with chipotle, zhoug, or even chili crisp. 🙂
Ooh yes, chipotle and zhoug sound so good — I hadn’t thought of those!
I can totally see the smoky chipotle playing so well with the crispy texture. And chili crisp? Always a win! 😄 I’ll have to try these combos next — thanks for the ideas!