Bloomin’ Onion Grilled Cheese

In honor of national grilled cheese month Udi’s Gluten Free Foods tasked me with creating a unique grilled cheese sandwich.

The grilled cheese sandwiches begin with Udi’s Gluten-free White Sandwich bread and have a generous amount of bloomin’ onion strings and dipping sauce in between gooey slices of Horizon Organic American Cheese. American cheese is my first choice for grilled cheese and cheeseburgers. I love the way it melts.

I started by making copycat bloomin’ onions that I baked instead of fried. I never had a bloomin’ onion before so I can’t compare the baked version against the fried but I’m certain the fried ones trump all. . . if you’re looking for less fat than the norm these will satisfy. (I included instructions for both baking and frying as well as a link to instructions for slicing the onions.)

The dipping sauce is completely addicting and irresistible. Made with mayonnaise, sour cream, ketchup and seasonings, we almost obliterated the onion strings without leaving enough for the grilled cheese. Oops.

Fried bloomin’ onions may trump baked bloomin’ onions but a bloomin’ onion grilled cheese?


Bloomin’ Onion Grilled Cheese

Rating: 51

Prep Time: 5 minutes

Cook Time: 6 minutes

Total Time: 11 minutes

Yield: 1 sandwich

Bloomin’ Onion Grilled Cheese

Grilled cheese sandwiches with american cheese, bloomin' onion strings and dipping sauce.


2 slices white sandwich bread, like Udi's Gluten-free
2 slices american cheese, like Horizon Organic
bloomin' onion strings
bloomin' onion sauce
soft butter


  1. Heat a skillet over medium-low heat.
  2. Place a slice of bread down on a cutting board or plate, top with one slice cheese then enough onion strings to cover the entire bread. Drizzle generously with sauce, place another layer of onion strings from edge to edge then a slice of cheese then another piece of bread.
  3. Butter the top slice generously from edge to edge. Add a small pat of butter to the pan and spread it around until it's melted. Place the sandwich butter side down in the skillet then butter the top slice.
  4. When bottom is golden brown carefully flip and cook the other side. If it begins to brown too much and the cheese hasn't melted turn heat down to low or off and put a lid on it for a minute or two.
  5. Serve with additional sauce on the side for dipping.

Bloomin’ Onion

Rating: 51

Prep Time: 40 minutes

Cook Time: 20 minutes

Total Time: 1 hour

Yield: 2-3 onions

Bloomin’ Onion

Copycat bloomin' onions, baked or fried with a decadent dipping sauce.


For the Dip:
1/3 cup light or regular mayonnaise
1/3 cup light or regular sour cream
2 tablespoons ketchup
1 teaspoon worcestershire sauce (skip this for gluten-free version)
1 tablespoon drained horseradish (optional)
1 teaspoon smoked paprika
pinch of cayenne pepper
coarse salt and freshly ground black pepper
For the Onion:
2-3 medium/large sweet onions like Vidalia (about 1 pound)
2 1/2 cups gluten-free or regular all-purpose flour
1 teaspoon cayenne pepper (optional)
2 tablespoons paprika
1/2 teaspoon dried thyme
1/2 teaspoon dried oregano
1/2 teaspoon ground cumin
freshly ground black pepper
2 large eggs
1 cup whole milk
coarse salt
For frying:
1 gallon vegetable or canola oil
For baking:
olive oil or canola non-stick baking spray


  1. Combine all of the dip ingredients in a bowl, cover and refrigerate.
  2. Slice the onion: visual instructions here.
  3. Whisk the flour, cayenne, paprika, thyme, oregano, cumin and 1/4 teaspoon black pepper in a bowl.
  4. In a small deep bowl, whisk the eggs, milk and 1 cup water.
  5. Place the onion in a separate bowl, cut-side up, and pour all of the flour mixture on top. Cover the bowl with a plate, then shake back and forth to distribute the flour. Check to make sure the onion is fully coated, especially between the "petals." Lift the onion by the core, turn over and pat off the excess flour.
  6. Using a slotted spoon, fully submerge the onion in the egg mixture, remove and let the excess egg drip off, then repeat the flouring process. Repeat for all onions. Refrigerate them while you heat the oil or preheat oven to 400 degrees F.
  7. To bake:
  8. Grease or line a large baking sheet with parchment and place the onions cut side up, spray them all over with the baking spray. Bake about 25-30 minutes until lightly golden and tender. Season with salt and serve with the dipping sauce.
  9. To fry:
  10. Heat the oil in a large deep pot over medium-high heat until a deep-fry thermometer registers 360 degrees F. Carefully lower the onion into the oil, cut-side down with a wire skimmer or large slotted spoon. Adjust the heat so the oil temperature stays close to 350 degrees. Fry about 3 minutes, then turn the onion over and cook until golden, about 3 more minutes. Drain on a plate lined with paper towels. Repeat. Season the onions with salt and serve with the dipping sauce.


Adapted from Food Network

Disclosure: This is a sponsored post. I received samples and coupons for product. All opinions are my own.

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  1. says

    Wow, this is such a great sandwich and appetizer. I haven’t had a bloomin onion in a long long time and I love that you lightened it up a bit. The sauce would be good on so many things and what a kick it must add to this sandwich.

  2. says

    I’ve never been to Outback so I’ve never had a bloomin’ onion either…but I’ve always wondered about them because they sound kind of amazing…like onion rings in pull apart form. and what isn’t better in pull apart form?

    This sandwich sounds so delicious! I’ve been seeing lots of oniony grilled cheese recipes lately and i think that’s a sign to try one!

  3. says

    Those both look so good! I saw that bread on another blog and sure need to find out where to get some. We love grilled cheese and also onions so this looks like a perfect meal for us!

    Sendings lots of cuddles to handsome Moon!

    • says

      A bloomin’ onion is a deep fried onion that they serve in a lot of restaurants here. They cut it up first and coat it with seasoned flour then you pull off ‘strings’ and dip it in sauce. It’s super fattening!

  4. says

    This looks amazing! I don’t eat a lot of bread as I am eating gluten free and haven’t found one that I love that isn’t too expensive! i just made a grilled cheese this afternoon on a corn tortilla!

    Gotta say, that Captcha code is mighty annoying. If you forget to enter it or if you do it wrong, you have to go back and type in your comment again. This will be the third time trying to leave a comment because of the Captcha. :-)

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