Unleash the Keto Flying Dutchman In-N-Out Burger: The Ultimate Onion-Wrapped Low-Carb Delight!

Craving a juicy, flavorful burger that fits your keto lifestyle? Look no further than the Onion-Wrapped Flying Dutchman In-N-Out Burger! This protein-style burger features succulent beef patties, melted cheese, and caramelized grilled onions, all slathered with a tangy and delicious In-N-Out-inspired spread. If you're an In-N-Out fan or simply seeking a low-carb burger option, this recipe is a must-try.

What is the Flying Dutchman?

The Flying Dutchman hails from the popular In-N-Out Burger chain. The original Flying Dutchman burger is made with just two beef patties and slices of cheese-no bun or extras. Harry Snyder, the founder of In-N-Out created the Flying Dutchman Burger. As people started making it and sharing on social media, some began using onion slices as a creative substitute for buns. It consists of two beef patties, two cheese slices, without buns or condiments. The Flying Dutchman is prepared as listed but then wrapped in sliced, grilled caramelized onions. Food reviewers slather the popular In-N-Out spread on top and drizzling their famous spicy yellow pepper juice right on top.

Why This Recipe Works

This recipe recreates the In-N-Out experience while keeping it keto-friendly. By using caramelized onion rounds instead of a bun, it slashes the carb count without sacrificing flavor. The homemade burger sauce captures the essence of the In-N-Out spread, ensuring a truly satisfying burger experience.

Ingredients You'll Need

For the Flying Dutchman Burger

Ground Beef: Good quality beef is best for this recipe, it will yield in overall top flavor and texture. Use your favorite ground meat. I used grass-fed beef with an 80/20 fat ratio. If you have dietary restrictions, ground turkey or chicken will work. Just be sure to adjust cooking times based on the type of ground meat.
Sliced Cheddar Cheese: In-N-Out uses pre-sliced American Cheese. However in this recipe, I used pre-sliced Cheddar Cheese. I’m not a big fan of American cheese and I knew two slices would be too much for me, so for this In-N-Out Flying Dutchman keto burger, I decided cheddar would be a better fit. You can certainly use what you have on hand or what you prefer.
Onion: For this recipe, if you want to stay true to the original, use white onions. I used yellow onions for a slightly sweeter taste. Either way, you can't go wrong! I used a large yellow onion and you want to cut the slices fairly thick so they stay together. Hey, when it comes to picking between white onions and yellow onions for this recipe, there's really no right or wrong choice. White onions pack a sharper, more in-your-face flavor, while yellow onions are all about that sweet, mellow vibe.
Salt and Pepper: Since we are using fresh ingredients, don't be alarmed the only seasonings used in this entire recipe is salt and pepper. Lightly sprinkle the patties with salt and pepper.
Butter: Unsalted works best to control the amount of salt in the overall recipe. We will use a little butter to caramelize the onions and produce an amazingly delicious crust on the edges of the burger patties, yum! I used a little olive oil, but avocado oil or even butter will work too.
Spicy Yellow Peppers: In-N-Out is known for their delicious spicy yellow peppers. These peppers are served with any meal ordered and adds a nice, tangy and spicy finish. These peppers pair so well with the burgers. Tap here to see the peppers I was able to grab for this recipe.

For the In-N-Out Spread (Burger Sauce)

Mayonnaise: Good quality always produces the best outcome. My favorite mayo brand is Blue Plate, tried and true since birth. It could be that I am southern, Southerners love Blue Plate Mayonnaise! Greek yogurt: I use this in place of Mayonnaise.
Ketchup: Most burger sauces start with a base of mayo and ketchup, no surprise here. Sugarfree Ketchup
Yellow Mustard: While this ingredient can be a bit overpowering, we are using a small amount that'll add the slight 'zing' to this burger sauce.
Sweet Relish: No surprise here, the sauce needs a hint of sweetness and the relish is absolutely perfect. No guessing here that In-N-Out uses relish in their spread, you can see it!
Dill Pickle Juice: This is my little secret addition to the sauce, trust me and then thank me later.
Sriracha: Totally optional, but if you like a hint of smoky and spicy, try it out and let me know what you think.
Worcestershire Sauce: Savory and Unami flavors brings this sauce to a delicious end, don't leave this baby out!
Stevia or any Low Carb Sweetener
Apple cider vinegar

Step-by-Step Instructions

Provided that the ingredients are prepped before beginning this recipe, this onion wrapped burger can be made in under fifteen minutes.

1. Prepare the In-N-Out Spread (Burger Sauce)

There are many burger sauces around, having tried the popular spread from In-N-Out, I have to say, theirs is one of the best! I've used a version of their burger spread for years, mostly on my delicious Bacon Cheeseburger Salad recipe.

You will need a small to medium sized bowl and a whisk.
Combine mayonnaise, relish, sugarfree ketchup, yellow mustard, stevia, apple cider vinegar and Worcestershire sauce.
Whisk all of the ingredients together and set aside. This sauce will be used for the burger and can be served on the side for dipping.
Add the mayonnaise, ketchup, sriracha (optional), Worcestershire Sauce, dill pickle juice, sweet relish, mustard and whisk thoroughly.
Taste for seasoning and add salt and pepper if desired.
Set aside until later use. The spread is simple to prepare and should be done first. It will need time to marinate and while the onion burgers are being prepared will be ample time!

2. Caramelize the Onion Rounds

First, decide which cooking pan/griddle you will use. It is important to note that a durable pan will work best such as a cast iron skillet, that is what was used in this recipe.
Then, you will need to slice the onions into two to three inch round slices. One large onion should yield about four to five round slices of onions.
Do not separate the onion slices, this will act as the bun for the Flying Dutchman burger patties.
I used a little olive oil, but avocado oil or even butter will work too.
In the cast iron skillet on medium to high heat, place one tablespoon of butter in the pan.
Once the butter begins to bubble, place each onion ring into the pan and season both sides with salt and pepper. I seasoned the onion slices with salt and pepper.
The caramelizing process will happen fairly quickly (about 3-5 minutes).
Be sure to only flip the onion rings once, ensuring each side is seasoned with salt and pepper. I started on medium high and then cut the heat down to medium low until the slices looked cooked and caramelized, flipping once. Try not to flip the slices too much as this will keep the slices intact and prevent them falling apart.
You will know when the onions are cooked through because the color will become golden brown and the onions will begin to soften and wilt.
Set the caramelized onions aside until later use.
Be sure to not clean the pan, there's flavor there that will be used when preparing the burger patties.

3. Prepare the Flying Dutchman Burger Patties

As mentioned, there are minimal ingredients needed to prepare these juicy delicious burger patties.

First, in a large bowl, add the ground beef.
Then, portion out each burger patty into 4 ounce round balls.
The key to the perfect smash style burger patties are thin style burger patties that are minimally seasoned.
In order to achieve the smash style burgers, I placed the burger on two pieces of parchment paper (top and bottom) and used a rolling pin to "smash" the burgers.
Use a burger smasher, bacon press, or even a pan to smash the balls down very flat.
This was the best option in my opinion because smashing them on the griddle releases a lot of that amazing flavor you want to maintain during the cooking phase.
After repeating this step to create four burger patties, in the same large skillet used to caramelize the onion rings, on medium/high heat (I used my grandmother's cast iron skillet), add one teaspoon of butter to the pan.
When the butter begins to bubble place each smashed patty onto the griddle and season each side liberally with crushed/coarse salt and cracked black pepper.
I like to mix the seasonings in the meat, but some people sprinkle them on the outside of the patties, either works just as well.
It is important to note, the burger patties do not need to be tampered with while cooking.
Only flip the patties once. Cook however you like the doneness of your burgers.
Once the burger patty is flipped, wait at least one minute before placing the sliced cheese on each patty.
Close with a lid fo4 a minute or two to melt the cheese. You can also use cheddar cheese slices if you prefer.
This cooking process should take 2-3 minutes per side depending on your desired temperature.

4. Assemble the Onion Wrapped Flying Dutchman

This step is very crucial and it's important to note, this burger is quite messy so have paper towels on hand!
After the burger patties have been removed from the cast iron skillet, place the caramelized onion rings back into the same pan the burger patties were prepared in on medium heat (this step only takes a few minutes).
Please note, you may need to remove some access grease from the pan, simply use a paper towel!
After the onion rounds have been placed into the pan, add a burger patty with cheese on top of each onion round. Allow a few minutes for the ingredients to mesh together and remove from the pan.
Simply stack each patty on top of each other making sure the onion rounds are on the outside of each patty, acting as a "bun" or cover.
Be careful, the patties will be hot!
To assemble each burger, stack two patties together on top of one yellow onion.
Then add a spoonful of burger sauce and top with one more onion slice. This burger can get a little messy! You can also wrap the bottom of each assembled burger with a little parchment paper like they do at in-n-out burger to keep things a little neater.
After the cheesy burger patties have been stacked and the grilled, caramelized onion rounds have been added, it is time to devour this messy but oh, so delicious onion wrapped burger.
I am sharing extra verbiage on how to eat this delicious burger because it needs all its glory.
To eat the burger as seen on social media, slather the In-N-Out spread sauce over the onion burgers, take a spicy yellow pepper and bite the tip off to release the juices.
Pour this juice over the burger and immediately bite into the burger.
Trust me, repeat these steps and you will want another onion burger immediately.

Tips and Variations

Ground Meat: Use your favorite ground meat. If you have dietary restrictions, ground turkey or chicken will work. Just be sure to adjust cooking times based on the type of ground meat.
Cheese: If you do like American cheese, feel free to use that in place of the cheddar.
Toppings: It's ok if you want to venture off a bit from traditional. You can certainly add sliced tomatoes, pickles and lettuce!
Double the patties: Add more burger patties to make this a triple burger sandwich.
Covering the pan with a lid while cooking the cheese will help it crisp up and become easier to remove from the pan.
You can also ask it to be mustard fried for even more flavor. The burger patty is spread with mustard and then grilled. The hot grill kind of sears the mustard flavor into the patty and it is delicious!

Serving Suggestions

I served the burgers with the viral Keto Onion Ring Chips, so with the onion in both recipes you do need to be careful with the carbs.

Is This Recipe Keto-Friendly?

This recipe is keto and low carb friendly. While it's slightly high in fat (30g) the calorie count is around 399. Erythritol carbs are not included in carb counts as it has been shown not to impact blood sugar. Net carbs are the total carbs minus fiber.

The In-N-Out Experience

If you are lucky enough to live close to an In-N-Out Burger, after preparing this recipe, you should try the real-deal out. Simply order it by asking for The Flying Dutchman with grilled onions! As mentioned, The Flying Dutchman consists of two beef patties with two cheese slices. Adding the grilled round sliced onions makes it onion wrapped, similar to the popular protein style burger (without buns).

Read also: Easy Low-Carb Cheese Crackers

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