Crispy Blooming Onion with Spicy Cheddar Fondue Tips, FAQ & printable recipe

Tips for success

To get the petals to separate evenly, chill the cut onion in the refrigerator for 30 minutes before coating. This firms up the layers and makes them easier to open.

When coating, use your fingers to gently separate the petals and sprinkle the flour mixture between them for an even crust.

For the fondue, always use freshly shredded cheese for the smoothest melt. If you prefer a spicier dip, add more hot sauce or a pinch of cayenne.

You can also make the fondue ahead and reheat it gently over low heat, whisking in a little milk if needed.

Variations

• Smoky Bacon Blooming Onion: Add 1/2 teaspoon smoked paprika to the flour mixture and sprinkle crumbled cooked bacon over the finished onion. The smoky flavor pairs beautifully with the sweet onion and cheddar fondue.
• Chipotle Lime Fondue: Stir 1 teaspoon chipotle powder and 1 tablespoon lime juice into the fondue for a smoky, tangy twist. This version adds a bright, zesty note that cuts through the richness.
• Herb-Infused Blooming Onion: Mix 1 tablespoon dried oregano and 1 teaspoon dried thyme into the flour mixture. The herbs add an earthy flavor that complements the onion's natural sweetness.
• Spicy Sriracha Fondue: Swap the hot sauce for 2 tablespoons sriracha and add a pinch of garlic powder. This gives the fondue a bold, garlicky heat that is sure to please spice lovers.

Storage and make-ahead

Fridge

Store leftover fried onion and fondue separately in airtight containers in the refrigerator for up to 2 days. Reheat the onion in the oven to restore crispness.

Freezer

The fried onion can be frozen for up to 1 month, but the texture may soften. Reheat in a 400°F (200°C) oven for 10 minutes.

Reheat

Reheat the onion in a 400°F (200°C) oven for 5-7 minutes. Reheat the fondue in a saucepan over low heat, stirring in a splash of milk if needed.

The fried onion is best enjoyed immediately, but leftovers can be stored in an airtight container in the refrigerator for up to 2 days. The fondue can also be refrigerated separately.

To reheat the onion, place it in a 400°F (200°C) oven for 5-7 minutes to restore crispness. The fondue can be reheated in a saucepan over low heat, stirring in a splash of milk to smooth it out.

The onion can be cut and coated up to 2 hours ahead, then refrigerated until ready to fry. The fondue can also be made a day ahead and refrigerated; reheat gently over low heat before serving. For the best texture, fry the onion just before serving.

Serving ideas

Serve the blooming onion hot and fresh, with the spicy cheddar fondue in the center. Place it on a large platter and let everyone pull off petals and dip them into the warm sauce.

This appetizer is perfect for parties, game days, or any gathering where sharing is encouraged.

Pair the blooming onion with a cold beer or a crisp white wine to balance the richness. For a heartier spread, serve it alongside other finger foods like chicken wings or sliders. The crispy onion and creamy fondue are a match made in heaven.

Frequently asked questions

Recipe card

Crispy Blooming Onion with Spicy Cheddar Fondue

Prep 30 minCook 15 minTotal 45 minServes 4

Ingredients

• 1 large sweet onion (such as Vidalia)
• 1 cup buttermilk
• 2 cups all-purpose flour
• 1 tbsp paprika
• 1 tsp garlic powder
• 1/2 tsp cayenne pepper
• 1 tsp kosher salt
• 1/2 tsp black pepper
• 2 cups shredded sharp cheddar cheese
• 1 cup heavy cream
• 1 tbsp hot sauce
• 1 tsp Dijon mustard
• 4 cups vegetable oil, for frying

Instructions

1. Peel the onion and trim the root end, keeping it intact. Place the onion cut-side down and make vertical cuts from the top to about 1/2 inch from the root, creating petals. Turn the onion over and gently separate the layers with your fingers. In a large bowl, whisk together the buttermilk and 1/2 cup of the flour to make a thick batter. In a separate shallow dish, combine the remaining 1 1/2 cups flour, paprika, garlic powder, cayenne, salt, and black pepper.
2. Dip the prepared onion into the buttermilk batter, making sure to coat all the petals. Let the excess batter drip off, then place the onion into the seasoned flour mixture. Use your hands or a spoon to sprinkle the flour mixture between every petal, ensuring an even coating. Gently shake off any excess flour and set the onion aside on a wire rack while the oil heats.
3. Pour the vegetable oil into a large pot or Dutch oven, filling it at least 2 inches deep. Attach a deep-fry thermometer to the side of the pot. Heat the oil over medium-high heat until it reaches 350°F (175°C). While the oil heats, line a baking sheet with paper towels and set a wire rack on top.
4. Carefully place the coated onion into the hot oil, cut-side down. Fry for 4 to 5 minutes, then use tongs to gently turn the onion over. Continue frying for another 4 to 5 minutes, until the coating is deep golden brown and crispy. Using tongs, lift the onion out of the oil and transfer it to the prepared wire rack. Let it drain and cool for 2 minutes.
5. In a small saucepan over medium-low heat, warm the heavy cream until it is steaming but not boiling. Gradually add the shredded cheddar cheese, stirring constantly with a whisk until the cheese is fully melted and the sauce is smooth. Stir in the hot sauce and Dijon mustard, and continue to cook for 2 to 3 minutes, until the fondue thickens slightly. Keep warm over low heat while serving.
6. Sprinkle the fried onion with a pinch of salt while it is still warm. Transfer the blooming onion to a serving platter and place the bowl of spicy cheddar fondue in the center. Serve immediately, pulling the petals apart to dip into the fondue.

Contains: gluten, milk, eggs, mustard

Estimated nutrition per serving

Calories

620

Protein

14 g

Carbohydrates

48 g

Fat

42 g

Automatic estimate from the ingredient list, not laboratory-verified.