Cajun Blooming Onions
- 20m Prep Time
- 21m Cook Time
- 41m Ready In
Crispy deep-fried sweet onions with a spicy Cajun kick, served with a creamy horseradish dipping sauce. Perfect as a party appetizer or side dish.
Ingredients
- 3/4 cup mayonnaise
- 1/2 cup sour cream
- 4 1/2 tbsp ketchup
- 4 1/2 tbsp creamy horseradish
- 2 tbsp Dijon mustard
- 2 tsp freshly squeezed lemon juice
- 2 tsp Cajun seasoning
- 1 1/2 tsp paprika
- 1 tsp Tabasco or your choice of hot sauce
- 2 large eggs
- 1 cup whole milk
- 2 cup all-purpose flour
- 2 1/2 tsp Cajun seasoning
- 2 tsp garlic powder
- 2 tsp onion powder
- 2 tsp seasoning salt
- 1 tsp ground black pepper
- 3 medium sweet onions
- Vegetable oil (I use corn oil) for deep-frying
Nutrition (per serving, estimated)
Estimated based off 14 of 19 identified ingredients (per 100 g food data, scaled by amount).
Vitamins & minerals
- Calcium: 113 mg
- Iron: 3.03 mg
- Magnesium: 32.8 mg
- Phosphorus: 171 mg
- Potassium: 353 mg
- Zinc: 1.04 mg
Let's Prepare
Collect
Gather these ingredients — no prep needed yet.
- 3/4 cup mayonnaise
- 1/2 cup sour cream
- 4 1/2 tbsp ketchup
- 4 1/2 tbsp creamy horseradish
- 2 tbsp Dijon mustard
- 2 tsp freshly squeezed lemon juice
- 2 tsp Cajun seasoning
- 1 1/2 tsp paprika
- 1 tsp Tabasco or your choice of hot sauce
- 2 large eggs
- 1 cup whole milk
- 2 cup all-purpose flour
- 2 1/2 tsp Cajun seasoning
- 2 tsp garlic powder
- 2 tsp onion powder
- 2 tsp seasoning salt
- 1 tsp ground black pepper
- 3 medium sweet onions
Prepare
- Vegetable oil (I use corn oil), for deep-frying
Let's Cook
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Step 1.
In a small bowl, combine ¾ cup mayonnaise, ½ cup sour cream, 4½ tablespoons ketchup, 4½ tablespoons creamy horseradish, 2 tablespoons Dijon mustard, 2 teaspoons lemon juice, 2 teaspoons Cajun seasoning, 1½ teaspoons paprika, and 1 teaspoon Tabasco. Stir until well combined. Set aside.
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Step 2.
In a large mixing bowl, whisk 2 large eggs and 1 cup whole milk until smooth. In another large mixing bowl, whisk together 2 cups all-purpose flour, 2½ teaspoons Cajun seasoning, 2 teaspoons garlic powder, 2 teaspoons onion powder, 2 teaspoons seasoning salt, and 1 teaspoon black pepper. Set both bowls aside.
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Step 3.
Peel 3 medium sweet onions and trim off the tops. Hold an onion trimmed side down. Starting from the top, make a vertical cut through the center three-fourths of the way down, keeping the bottom intact. Repeat cuts all around the top every ¼ inch to create petals. Repeat with remaining onions.
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Step 4.
Fan out the petals of each onion. Coat each onion first with the seasoned flour mixture, then dip into the egg mixture, then coat again with the seasoned flour until nicely coated.
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Step 5.
Pour 3 to 4 inches of vegetable oil into a large pot. Heat over medium-high heat until the oil reaches 350°F, or until it shimmers and dances across the top.
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Step 6.
Deep-fry the onions, flipping once, until golden brown, about 7 minutes. Remove from oil and place on a paper-towel-lined plate. Let cool until safe to eat, then serve with the sauce.