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Blooming Onion and Dipping Sauce

Rated as 4.55 out of 5 Stars

"This batter-fried onion and a spicy dipping sauce will get your party going any day!"
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servings 290
Original recipe yields 6 servings (4 servings)


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  1. To make sauce: In a medium bowl, combine mayonnaise, ketchup, horseradish, 1/3 teaspoon paprika, 1/4 teaspoon salt, 1/8 teaspoon oregano, a dash ground black pepper and cayenne pepper; mix well. Keep sauce covered in refrigerator until needed.
  2. To make the batter: In a medium bowl, beat egg and add milk. In a separate bowl, combine flour, salt, cayenne pepper, paprika, ground black pepper, oregano, thyme and cumin; mix.
  3. To slice onion: slice 1 inch off of the top and bottom of the onion and remove the papery skin. Use a thin knife to cut a 1 inch diameter core out of the middle of the onion. Now use a very sharp, large knife to slice the onion several times down the center to create 'petals': First slice through the center of the onion to about three-fourths of the way down. Turn the onion 90 degrees and slice it again in an X across the first slice. Keep slicing the sections in half, very carefully until the onion has been cut 16 times. Do not cut down to the bottom of the onion. (The last 8 slices will be difficult, be careful).
  4. Spread the 'petals' of the onion apart. To help keep them separate you could plunge the onion into boiling water for 1 minute and then into cold water.
  5. Dip the onion into the milk mixture and then coat it liberally with the flour mixture. Again separate the petals and sprinkle the dry coating between them. Once you're sure the onion is well-coated, dip it back into the wet mixture and into the dry coating again. This double-dipping ensures you have a well-coated onion because some of the coating will wash off when you fry the onion.
  6. Heat oil in a deep fryer or deep pot to 350 degrees F (175 degrees C). Make sure you use enough oil to completely cover the onion when it fries.
  7. Fry the onion right side up in the oil for 10 minutes or until it turns brown. When the onion has browned, remove it from the oil and let it drain on a rack or paper towels. Open the onion wider from the center so that you can put a small dish of the dipping sauce in the center.


  • Editor's Note
  • We have determined the nutritional value of oil for frying based on a retention value of 10% after cooking. The exact amount may vary depending on cook time and temperature, ingredient density, and the specific type of oil used.

Nutrition Facts

Per Serving: 290 calories; 20.2 22.5 5.4 43 844 Full nutrition

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Read all reviews 265
  1. 344 Ratings

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Most helpful positive review

EXCELLENT! I recommend going on ebay and buying the "Great American Steakhouse Onion Machine". Its really cheap and makes it soooo easy to make the blooms. It works great! Otherwise if doing...

Most helpful critical review

Pretty good in the end. But difficult and tricky to complete. Good luck!

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Most positive
Least positive

EXCELLENT! I recommend going on ebay and buying the "Great American Steakhouse Onion Machine". Its really cheap and makes it soooo easy to make the blooms. It works great! Otherwise if doing...

great recipe! for everyone having problems with the batter not sticking i recomend after dredging in batter allow it to sit for a while, 10min. Also beautiful presentation!!

I've combined a lot of the wisdom from other reviewers and added some of my own. Firstly, I think it's important to do this in a LARGE fryer. I use the turkey fryer at 375 F. The onion is larg...

I cut the onion into petals to make it easier on myself after seeing some of the other reviews. The sauce was amazing. I have been looking for something like this for a while. That alone is w...

No one at my GNO party could believe I actually made this - it turned out beautifully! I took a previous reviewer's suggestion and put the cut onion in simmering water for one minute, then in a...

I don't get the craving for these often but when I do...look out! This recipe is amazing! It rivals that of Outback or any other steakhouse company that have this on their menus! Since I realize...

We loved this! I used the batter mixture to make onion rings instead of the blooming onion and then we dipped the rings in the sauce. It was a hit!!!

If you like the taste of this dipping sauce, try this; Thousand Island dressing and creamy horseradish sauce! I used to work in a popular restaraunt and this is how we made ours. People loved it...

This is awesome. So much fun to serve. The sauce is perfect. It's definitely not an appetizer because once you start eating them, you can't stop! Then, there's no room left for a meal! Grea...