Make crispy onions at home with this copycat French Fried Onions recipe. These are a great topping for casseroles, salads, and other side dishes.

Crispy French Fried Onions Copycat Recipe

​Make crispy onions at home with this copycat French Fried Onions recipe. These are a great topping for casseroles, salads, and other side dishes. 

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Do you know those delicious fried onions everyone puts on top of sweet potatoes and other casseroles? Well, we made them at home! This was a work-in-progress recipe and took a few tries, but we have now successfully made beautiful golden deep fried onions. 

When I look at the ingredients for the French’s brand of crisp fried onions, they aren’t too bad. This wasn’t made from necessity, but more because it sounded fun to try. We originally made them to use to top our sweet potato casserole, but they are great for a quick snack or to top salads. 

My recipe for crispy fried onions uses 2 large onions. I tried it with red onions, white onions, and yellow onions. The best taste came from the yellow onions since they are a bit more mild in flavor. You could try yours, though, with different kinds of onions to see what you like best. 

When preparing the onions recipe, you’ll want to make sure you have a sharp knife so you can get the onions cut into thin slices. After slicing, we cut the rings in half to make them half-moon shaped. Depending on the recipe you plan to use these with, you may want to make them larger or smaller. 

Luckily, the only thing that takes a lot of time for this recipe is the marinade. The sliced onions are soaked in buttermilk for 24 hours. This doesn’t affect the taste of the crunchy fried onions but helps to make the flavor a bit more mild. If you are using a stronger onion, you may want to let them rest longer. 

As always when you are cooking with hot oil, be careful about how much you put in the pan at a time. You don’t want it spitting hot oil at you. And, if you put a large quantity of onions in at once it can lower the temperature of the oil. 

French Fried Onions Step by Step

Ingredients

  • 2 yellow onions, sliced thinly then cut in half
  • 1 cup buttermilk
  • 1 cup flour
  • 1 tsp kosher salt
  • 1 tsp black pepper
  • High-heat oil for frying (such as canola oil)

Preparation

In a large bowl, soak onions in buttermilk for 24 hours in the refrigerator, stirring occasionally.

Pour enough oil into a large cast-iron skillet until you have about an inch of oil and heat over medium heat.

Drain the buttermilk-soaked onions on a paper towel.

Add the flour to a medium bowl and whisk with the salt and pepper.

Toss about a quarter of the onions in the flour mixture until well coated.

Use tongs to grab the coated onions and carefully place them in the hot oil.

Fry for about 3-5 minutes on each side until golden brown.

Drain on a wire rack lined with paper towels to absorb excess oil.

Continue in batches until all onions are fried.

French Fried Onions Leftovers

Storage: Store leftover crispy fried onions in an airtight container at room temperature for a day. If you need to save them longer, refrigerate them for up to 4-5 days. 

Reheating: Since these were originally fried, they are best reheated in an air fryer or in the oven. 

Freezing: Place drained and cooled French Fried Onions in a freezer-safe ziplock bag and freeze for up to one month. 

Recipe

Originally Published On: July 10, 2023

Crispy French fried onions in a round white bowl with a salad, forks, and water glasses behind and a towel in front all on a wooden surface

Fried Onions

​Make crispy onions at home with this copycat French Fried Onions recipe. These are a great topping for casseroles, salads, and other side dishes. 
Prep Time 10 minutes
Cook Time 20 minutes
Marinade Time 1 day
Total Time 1 day 30 minutes
Course:
Homemade Staple
Cuisine:
American
Diet
Vegetarian
Keyword:
french onion
|
fried
|
fried onions
|
onions
|
yellow onions
Dietary Needs:
Egg-Free
|
Nut-Free
Cooking Method:
One-Pan Meals
Servings: 20
5 from 7 votes

Ingredients

  • 2 yellow onions (sliced thinly then cut in half)
  • 1 cup buttermilk
  • 1 cup flour
  • 1 tsp kosher salt
  • 1 tsp black pepper
  • High-heat oil for frying (such as canola oil)

Instructions

  • In a large bowl, soak onions in buttermilk for 24 hours in the refrigerator, stirring occasionally
  • Pour enough oil into a large cast-iron skillet until you have about an inch of oil and heat over medium heat
  • Drain the buttermilk-soaked onions on a paper towel
  • Add the flour to a medium bowl and whisk with the salt and pepper
  • Toss about a quarter of the onions in the flour mixture until well coated
  • Use tongs to grab the coated onions and carefully place them in the hot oil
  • Fry for about 3-5 minutes on each side until golden brown
  • Drain on a wire rack lined with paper towels to absorb excess oil
  • Continue in batches until all onions are fried
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Nutrition Facts
Fried Onions
Amount Per Serving (2 tbsp)
Calories 35 Calories from Fat 5
% Daily Value*
Fat 0.5g1%
Saturated Fat 0.2g1%
Polyunsaturated Fat 0.1g
Monounsaturated Fat 0.1g
Cholesterol 1mg0%
Sodium 129mg5%
Potassium 40mg1%
Carbohydrates 6g2%
Fiber 0.4g2%
Sugar 1g1%
Protein 1g2%
Vitamin A 21IU0%
Vitamin C 1mg1%
Calcium 18mg2%
Iron 0.3mg2%
* Percent Daily Values are based on a 2000 calorie diet.

All nutritional information is based on third-party calculations and should be considered estimates. Actual nutrition content will vary based on brands used, measuring methods, portion sizes, and more.

Savory Homemade Staples

10 thoughts on “Crispy French Fried Onions Copycat Recipe”

  1. 5 stars
    I love the idea of frying onions, especially with buttermilk. Have to admit that I am hearing of this for the first time. Have to try it though. Thanks for sharing!

  2. I have had something similar that was store-bought. I never thought to make these on my own. Sounds so delicious! I’m sure when they are made fresh, I would find myself snacking on them!

  3. Catherine Shane Cabuhat Rojo

    5 stars
    Oh it looks good! I would definitely try this for our dinner, thanks for sharing this recipe!

  4. 5 stars
    I really enjoyed your copycat recipe for crispy French fried onions! The instructions were clear and easy to follow, and the end result was delicious. It’s a great alternative to store-bought fried onions. Thanks for sharing!

  5. Wow, making your own French fried onions sounds like a fun experiment! I love that you tried different types of onions to see which tasted the best. And it’s great that the marinade doesn’t take too much time, but it really helps to make the onions more flavorful. Thanks for sharing your recipe and tips on how to fry them safely!

  6. Wow, this crispy recipe is a game-changer! I’ve always loved those onions on top of green bean casserole, and now I can make them at home too. Thanks for sharing this fantastic recipe! Can’t wait to try it out. 🧅🍴😋

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