Blooming Onion
A whole sweet onion cut into petals, coated in seasoned flour and deep-fried until it opens like a golden flower, served with a creamy horseradish dipping sauce.
Blooming Onion: Step by Step
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Cut 1 cm off the top of the onion and peel it, leaving the root end intact. Set the onion cut side down and cut it into 16 wedges from the top down, stopping 1.5 cm short of the root. Turn it over and gently fan the petals apart.
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Soak the onion in a bowl of iced water for 20 minutes so the petals open, then drain it and pat it very dry, including between the petals.
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Mix the flour, paprika, garlic granules, oregano, cayenne and salt in a large bowl. Whisk the eggs and milk in another bowl.
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Lay the onion in the flour and spoon the flour between the petals. Shake off the excess, dip the onion in the egg mixture, spooning it between the petals, and return it to the flour to coat it again. Shake off the excess.
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Heat the oil in a deep, heavy pan to 175°C / 350°F. Lower in the onion, petals down, and fry for 2 minutes, then turn it over with two spoons and fry for 5 to 6 minutes more, until golden brown. Drain on a wire rack.
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Mix the mayonnaise, ketchup, horseradish, paprika and cayenne in a small bowl. Serve the onion at once with the sauce in the middle or beside it.
Keep an Eye on These
- Keep the root end whole and stop cutting well short of it. Cut through it and the onion falls apart in the oil.
- Dry the onion thoroughly after the soak. Water between the petals makes the coating slide off and the oil spit.
- Hold the oil steady at 175°C / 350°F. Too cool and the onion turns greasy, and too hot and the coating burns before the onion softens.
Swaps and Variations
- Fresh herbs work in place of the dried oregano at roughly three times the quantity — a teaspoon of dried is about a tablespoon of fresh, chopped.
A Little Background
The blooming onion is one of the great American restaurant appetizers, a whole onion cut into a flower of petals, dipped in batter and deep-fried until it opens out and turns gold, and served in the middle of the table with a dipping sauce. It was made famous by a chain of steakhouses in the late 1980s, and it was so successful that versions of it appeared on menus in pubs and diners across the country, and later around the world. It is worth making at home once, if only for the way it looks when it arrives. The cutting is the key. A large onion is peeled, the top is cut off and the root is left on, and then the onion is cut into wedges from top to bottom, stopping before the root, so it holds together. After a soak in iced water the petals open out, and they are coated in seasoned flour, in egg and milk, and then in flour again, working the coating between the petals with a spoon. In hot oil the onion fries and opens fully. It is a large sweet onion that gives the best result, a Vidalia or another sweet variety, because it fries to a soft, sweet middle. The dipping sauce is a creamy mix of mayonnaise, ketchup, horseradish and spices.
To Go With It
Steak · Cold lager · Coleslaw
Leftovers
Best eaten at once. It will not keep, but the sauce keeps in the fridge for up to 5 days.
Quick Answers
How long does Blooming Onion take to make?
About 45 minutes in total — 30 minutes of preparation and 15 minutes of cooking. The recipe serves 4.
What are the key tips for making Blooming Onion?
Keep the root end whole and stop cutting well short of it. Cut through it and the onion falls apart in the oil. Dry the onion thoroughly after the soak. Water between the petals makes the coating slide off and the oil spit. Hold the oil steady at 175°C / 350°F. Too cool and the onion turns greasy, and too hot and the coating burns before the onion softens.
What should I serve with Blooming Onion?
Steak; Cold lager; Coleslaw.
How should Blooming Onion be stored?
Best eaten at once. It will not keep, but the sauce keeps in the fridge for up to 5 days.
Is Blooming Onion suitable for a special diet?
This recipe is no added sugar. Those labels are checked against the ingredient list, so a dish is only marked when nothing in it contradicts the claim.
How many calories are in Blooming Onion?
About 536 kcal per serving, with 7 g protein, 37 g carbohydrate and 40 g fat. The figures are calculated from the ingredient list and are an estimate.
Blooming Onion Nutrition
Per serving, calculated from the ingredient list. Treat these as an estimate — brands and cuts vary.
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Written and tested by Turab
One person, one kitchen — no test kitchen, no team. How every recipe on this site is checked before it goes up.