Crispy fried onions are a delicious and crunchy topping that adds flavor and texture to many dishes. Whether sprinkled over casseroles, burgers, or salads, these golden-brown onions make everything taste better. Made with just a few simple ingredients, they are easy to prepare at home.

The onions are thinly sliced, soaked in buttermilk for extra tenderness, coated in flour, and fried to a perfect crisp. Freshly made, they have a light, airy crunch that store-bought versions can’t match. Whether you use them as a topping or enjoy them as a snack, homemade crispy fried onions are always a treat.
Why This Recipe Works
This recipe works because the buttermilk soak softens the onions and helps the flour coating stick, creating a crispy, golden crust. The thin slices fry quickly, ensuring they stay crunchy without absorbing too much oil. Frying at the right temperature (350°F/175°C) ensures even cooking, preventing soggy or greasy onions. The balance of salt and seasoning enhances the natural sweetness of the onions, making them flavorful and addictive.
Another reason this recipe is great is its versatility. You can use different types of onions, adjust the seasoning, or even bake them for a healthier version. They store well in an airtight container, making them perfect for meal prep. Whether you’re topping green bean casserole, mashed potatoes, or a juicy burger, crispy fried onions add the perfect finishing touch to any dish!

Ingredients
Onions – The star ingredient, sliced thin for crispy texture.
Substitutes: Shallots for a slightly sweeter taste.
Flour – Coats the onions to create a crunchy crust.
Substitutes: Cornstarch for an extra light and crispy texture.
Salt – Enhances the natural sweetness of the onions.
Substitutes: Garlic salt or seasoned salt for extra flavor.
Oil – Used for deep frying to get a golden crunch.
Substitutes: Vegetable oil, canola oil, or peanut oil.
Buttermilk – Helps the flour stick and adds flavor.
Substitutes: Milk with a little vinegar or water if needed.
Tips
- Slice onions thinly for the crispiest texture.
- Soak onions in buttermilk for at least 10 minutes for better coating.
- Use hot oil (around 350°F/175°C) to fry evenly.
- Drain on paper towels to remove excess oil.
- Store leftovers in an airtight container to keep them crispy.

How to Serve
Crispy fried onions add a delicious crunch and a burst of flavor to many dishes. They are perfect for topping meals, mixing into recipes, or enjoying as a snack. The crispy texture and slightly sweet, salty taste make them a versatile ingredient.
- Sprinkle over green bean casserole or mashed potatoes for extra crunch.
- Use as a topping for burgers, hot dogs, or salads.
- Mix into soups or sandwiches to add a crispy bite.
Similar Recipes

Crispy Fried Onion
Ingredients
- 2 large onions thinly sliced
- 1 cup buttermilk
- 1 cup all-purpose flour
- ½ teaspoon salt
- 2 cups vegetable oil for frying
Instructions
- Slice onions thinly and soak them in buttermilk for 10-15 minutes.
- In a separate bowl, mix flour and salt.
- Heat oil in a deep pan to 350°F (175°C).
- Remove onions from buttermilk, coat them in the flour mixture, and shake off excess.
- Fry in batches until golden brown, about 2-3 minutes.
- Remove and drain on paper towels.
- Serve immediately or store in an airtight container.
Nutrition
Notes
• Soak onions in buttermilk for at least 10 minutes for better coating.
• Use hot oil (around 350°F/175°C) to fry evenly.
• Drain on paper towels to remove excess oil.
• Store leftovers in an airtight container to keep them crispy.
Good for topping.