French fried onions are a delightful addition to many dishes, adding a crispy texture and a burst of flavor. Perfect as a topping for casseroles, burgers, or salads, these golden-brown treats are sure to elevate your culinary creations.
If you don't usually keep buttermilk at home, you might need to pick some up at the supermarket. It's essential for soaking the onions to achieve that perfect crispy coating. Additionally, make sure you have enough vegetable oil for frying, as this recipe requires a substantial amount.

Ingredients For French Fried Onions Recipe
Onions: Thinly sliced to ensure even frying and maximum crispiness.
Buttermilk: Used to soak the onions, adding a tangy flavor and helping the flour mixture adhere better.
All-purpose flour: Forms the base of the coating, giving the onions their crispy texture.
Salt: Enhances the flavor of the onions and the coating.
Black pepper: Adds a slight kick and depth of flavor to the coating.
Vegetable oil: Used for frying the onions to a golden brown and crispy perfection.
Technique Tip for This Recipe
For an extra layer of flavor, try adding a pinch of cayenne pepper or paprika to the flour mixture. This will give your French fried onions a subtle kick and enhance their overall taste. Additionally, make sure the oil is at the right temperature before frying; if it's too cool, the onions will absorb more oil and become greasy rather than crispy. Use a thermometer to ensure the oil is around 350°F (175°C) for optimal frying.
Suggested Side Dishes
Alternative Ingredients
thinly sliced onions - Substitute with shallots: Shallots have a milder flavor and can provide a similar texture when fried.
buttermilk - Substitute with plain yogurt: Plain yogurt can mimic the tanginess and thickness of buttermilk.
all-purpose flour - Substitute with cornstarch: Cornstarch can create a crispier coating when frying.
salt - Substitute with soy sauce: Soy sauce can add a similar level of saltiness with an additional umami flavor.
black pepper - Substitute with white pepper: White pepper provides a similar heat but with a slightly different flavor profile.
vegetable oil - Substitute with canola oil: Canola oil has a high smoke point and neutral flavor, making it suitable for frying.
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How to Store / Freeze This Recipe
Allow the French fried onions to cool completely before storing. This helps maintain their crispiness and prevents condensation from making them soggy.
Store the cooled onions in an airtight container. A glass jar or a resealable plastic bag works well. Ensure the container is completely sealed to keep out moisture and air.
For short-term storage, keep the container in a cool, dry place. The pantry or a cupboard is ideal. They should stay fresh for up to 3 days.
For longer storage, place the airtight container in the refrigerator. This can extend their shelf life to about a week, but be aware that refrigeration may slightly affect their crispiness.
To freeze French fried onions, spread them out on a baking sheet in a single layer. Freeze them for about an hour or until they are solid. This prevents them from sticking together.
Once frozen, transfer the onions to a freezer-safe bag or container. Label the container with the date to keep track of their storage time.
When ready to use, reheat the frozen onions in the oven at 350°F (175°C) for about 5-10 minutes. This will help restore their crispiness.
Avoid microwaving the French fried onions as it can make them soggy. The oven method is the best way to maintain their texture.
If you notice any signs of spoilage, such as an off smell or mold, discard the onions immediately. Freshness is key to enjoying their full flavor and crunch.
How to Reheat Leftovers
Preheat your oven to 350°F (175°C). Spread the French fried onions in a single layer on a baking sheet. Bake for 5-10 minutes until they are crispy and heated through.
Use an air fryer set to 350°F (175°C). Place the French fried onions in the basket in a single layer. Heat for 3-5 minutes, shaking the basket halfway through to ensure even reheating.
Heat a skillet over medium heat. Add a small amount of vegetable oil to the pan. Once the oil is hot, add the French fried onions in a single layer. Stir occasionally and heat for 2-3 minutes until crispy.
For a quick microwave method, place the French fried onions on a microwave-safe plate lined with a paper towel. Microwave on high for 20-30 seconds. Note that this method may not retain the same level of crispiness as other methods.
Best Tools for This Recipe
Frying pan: A large, deep pan is essential for frying the onions evenly and achieving a golden brown color.
Slotted spoon: This tool helps in removing the fried onions from the hot oil while allowing excess oil to drain off.
Mixing bowl: You'll need a couple of these to soak the onions in buttermilk and to mix the flour, salt, and pepper.
Paper towels: These are used to drain the fried onions and absorb any excess oil.
Measuring cups: These are necessary for accurately measuring the buttermilk, flour, and vegetable oil.
Knife: A sharp knife is needed to thinly slice the onions.
Cutting board: This provides a stable surface for slicing the onions.
Tongs: Useful for turning the onions in the oil and for handling them safely.
Thermometer: An optional tool to ensure the oil is at the right temperature for frying, around 350°F (175°C).
How to Save Time on Making This Recipe
Pre-slice onions: Slice the onions ahead of time and store them in an airtight container in the fridge.
Use a mandoline: A mandoline slicer ensures even, thin slices quickly.
Pre-mix flour mixture: Combine flour, salt, and pepper in advance and store in a sealed container.
Heat oil while soaking: Start heating the oil while the onions soak in buttermilk.
Batch frying: Fry in larger batches if your pan allows to save time.
Drain efficiently: Use a wire rack over paper towels for faster draining and crispier onions.

French Fried Onions Recipe
Ingredients
Main Ingredients
- 2 large Onions thinly sliced
- 1 cup Buttermilk
- 1 cup All-purpose flour
- 1 teaspoon Salt
- 1 teaspoon Black pepper
- 2 cups Vegetable oil for frying
Instructions
- 1. Soak the thinly sliced onions in buttermilk for at least 10 minutes.
- 2. In a separate bowl, mix flour, salt, and black pepper.
- 3. Heat the vegetable oil in a frying pan over medium-high heat.
- 4. Dredge the soaked onions in the flour mixture, coating them well.
- 5. Fry the coated onions in batches until golden brown and crispy, about 2-3 minutes per batch.
- 6. Remove the fried onions with a slotted spoon and drain on paper towels.
Nutritional Value
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