Onion Strings

So simple, yet so good! A few ingredients transform sliced onions into crispy Onion Strings perfect for topping a burger or eating on their own!

onion strings on a plate with ketchup

Each year, my sister and her husband join us for an Apple Cider Doughnut making day.  It’s one of my favorite days of the fall.  

In the last few years, we’ve decided that we may as well put the hot oil to good use and fry something else!  We now follow up the doughnuts with these Onion Strings from the Pioneer Woman.  They are so good, they may even beat the doughnuts…no seriously, they are that good!

We only deep fry once a year, so you better bet we are getting the most out of it and making these. If you ever find yourself with a pot of hot oil, try these. They will not disappoint!

Don’t have Buttermilk on Hand?

When I need buttermilk for a recipe and can’t get to the store, I make homemade buttermilk. Simply mix 1 tablespoon of white vinegar per 1 cup of milk and let it sit for 5 minutes. For this recipe, you would need to mix 2 tablespoons of white vinegar with 2 cups of milk. Any kind of milk should work – skim, 2%, or whole.

Can these be made in an Air Fryer?

I do not own an air fryer, so I cannot say either way. I definitely think it would be worth a try though!

What to Serve with Onion Strings?

One of my favorite restaurant chicken sandwiches is similar to a Cowboy Burger with cheddar cheese, BBQ sauce, and onion strings. These would be great on a chicken sandwich, a Turkey Burger, or a traditional hamburger.

Gluten Free Onion Strings

I haven’t tried it myself yet, but I have good luck using Bob’s Red Mill Gluten Free 1 to 1 Baking Flour in place of all purpose flour in many recipes.

onion strings on a plate

Looking for More Sides to go with Burgers?

Check out these Potato recipes:
Parmesan Potatoes
Garlic Parmesan Oven Fries
Potatoes and Onions
Hot Crash Potatoes

onion strings on a plate with ketchup

Onion Strings

A simple coating for sliced onions that are fried into perfectly crispy Onion Strings. These are great on top of or alongside your favorite burger!
Prep Time 1 hour 5 minutes
Cook Time 15 minutes
Total Time 1 hour 20 minutes
Course Side Dish
Cuisine American
Servings 6


  • 1 whole large onion (sliced very thin)
  • 2 cups buttermilk
  • 2 cups all purpose flour (or gluten free flour blend)
  • 1 scant tablespoon table salt
  • 1/4 – 1/2 teaspoon cayenne pepper
  • 1 – 2 quarts Canola oil
  • Salt and freshly ground black pepper to taste


  • Place sliced onions in a baking dish, cover with buttermilk, and soak for at least an hour.
  • Combine dry ingredients and set aside.
  • Heat oil to 375 degrees F in a Dutch oven. Grab a handful of onions, throw into the flour mixture, tap to shake off excess, and plunge into hot oil. Fry for a few minutes and remove as soon as golden brown. Season with salt and pepper as desired and serve immediately.
  • Repeat with remaining onions.


Source: Adapted from the Pioneer Woman
You’re Gonna Bake It After All
Keyword American, gluten free, side dish

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