Flying Dutchman In-N-Out Recipe (Keto Onion Burger)

This content originally appeared on Low Carb Yum. Republished with permission.

ATTENTION! Have you ever heard of the Flying Dutchman In-N-Out burger? It’s a secret menu item that only TRUE In-N-Out fans know about. But what if we told you that you could make this iconic burger at home? That’s right, the Flying Dutchman In-N-Out recipe is here, and it’s even better than the original!

What Is A Flying Dutchman At In-N-Out?

Have you heard of the term “protein style” at In-N-Out? It refers to ordering a burger without the bun, wrapped in lettuce instead. Well, the Flying Dutchman takes that concept to a WHOLE new level.

The key to this delicious burger is all in the “bun” – or, should we say, onion rings! Swapping out the usual lettuce for bun replacement, this burger goes all in with two crispy, cheese-coated onion rings as the buns, making it a super tasty meal.

But what really sets this burger apart is the secret sauce – Keto Thousand Island sauce. This tangy and creamy sauce pairs perfectly with the savory beef patties and melted cheese.

Trust me; one bite of this Flying Dutchman In-N-Out burger, and you’ll be hooked!

How To Make A Grilled Flying Dutchman Burger At Home

Making this copycat recipe from In-N-Out Burger only requires 7 ingredients and 25 minutes. It’s perfect for a quick weeknight dinner or a fun weekend BBQ with friends!

All you need to make a keto onion burger is:

Ground beef for the perfect patties
Thick white onions for the “bun”
Cheddar cheese for extra flavor and crunch
Salt and pepper
Keto Thousand Island sauce (link to ingredients in recipe card)
American cheese for that classic cheesy goodness
A hot skillet or grill to cook it all up!

Follow the instructions in the recipe card down below for the perfect Flying Dutchman In-N-Out experience. And don’t forget to top it off with some extra Keto Thousand Island sauce for dipping!

Which is better: white onions or yellow onions?

Hey, when it comes to picking between white onions and yellow onions for this recipe, there’s really no right or wrong choice. It all boils down to what you like better.

White onions pack a sharper, more in-your-face flavor, while yellow onions are all about that sweet, mellow vibe. Either way, they’re both great choices for the “bun” on your Flying Dutchman burger.

My Secret Hack To Getting That Crispy Onion Bun

You may be wondering, “How do I get that perfect crispy cheese coating on the onion bun without it sticking to the pan?”

Here’s my secret hack: use a lid!

Covering the pan with a lid while cooking the cheese will help it crisp up and become easier to remove from the pan. Trust me, it’s a game-changer.

What To Serve With Flying Dutchman Burger

Now that you have the perfect keto onion burger, you might be wondering about the sides. Because, let’s be honest, side dishes can sometimes make or break a meal. But don’t worry, we’ve got you covered with some delicious and keto-friendly options!

My go-to is using this recipe for jicama fries and making a keto version of animal-style fries! Crispy, seasoned jicama fries topped with cheese, caramelized onions, and a keto version of In-N-Out’s special sauce. It’s the perfect complement to your Flying Dutchman burger.

Other great options include:

Grilled cabbage steaks with bacon and bleu cheese
Oven-roasted asparagus topped with a lemon juice drizzle
Keto cauliflower mac and cheese
Tomato and cucumber salad with vinegar dressing

These side dishes are total game-changers for your keto diet. They’re super tasty and mix things up a bit. And the best part? You can whip them up in no time while your Flying Dutchman burgers are sizzling away. Talk about a simple yet satisfying meal!

Love This Keto Onion Burger? Try These Recipes!

If you really enjoyed this burger recipe, try these keto recipes this summer whenever you are planning a backyard cookout:

Air Fryer Hamburgers are so easy to make – not to mention less greasy and healthier for you too!
Make the best-grilled burgers with my Hamburger Seasoning recipe made with your favorite spices like garlic powder and paprika.
Enjoy these Low Carb Hamburger Buns, which make the perfect bun for any type of burger or sandwich you are craving!
Cheeseburger Pie is the perfect dish to serve at your next cookout – it’s easy and loaded with flavor.
For a fun twist on traditional burgers, try this Big Mac Cheeseburger Salad recipe. It’s packed with all the flavors of a McDonald’s Big Mac but without the carbs!

Follow us on FACEBOOKPINTEREST, and INSTAGRAM for even more tasty keto-friendly recipes!


Flying Dutchman In-N-Out Recipe (Keto Onion Burger)

This Flying Dutchman In-N-Out recipe switches up the classic burger game, making it keto-friendly with its crispy cheese onion buns and tangy sauce. It’s a cool new take on an old favorite!
Course Main Course
Cuisine American
Prep Time 10 minutes minutes
Cook Time 15 minutes minutes
Servings 2
Calories 882kcal


For the Onion „Bun“:

2 white onions large4 tablespoons cheddar cheese shredded

For the Patties:

1 pound ground beef 80/20¼ teaspoon salt to taste¼ teaspoon pepper to taste4 slices American cheddar cheese2 tablespoons keto Thousand Island dressing


Slice onions into thick rings and cook in a hot skillet until softened and slightly charred.
Sprinkle 2 tablespoons of shredded cheddar cheese on one side of each onion ring. Once the cheese melts, flip it over so the cheese is on the bottom. Cover with a lid and cook until melted and crispy. About 1-2 minutes.
Divide ground beef into 4 portions. Form into a burger patty shape then season with salt and pepper
Cook patties in a skillet or grill until desired doneness is reached. Place a slice of American cheese on each patty and let it melt while the patties rest.
Assemble burgers by placing a cheese-coated onion ring and a spoonful of the Thousand Island sauce, followed by a beef patty, and repeating layers as needed. Finish with a cheese-coated onion.
Serve immediately and enjoy!


Serving Size = 1 burger with two patties
It is ESSENTIAL to cover the pan with a lid when crisping the cheese on the onions if the pan is not covered while the cheese crisps, it will be difficult to remove from the pan!

Low Carb Sweeteners | Keto Sweetener Conversion Chart

Additional Info

Net Carbs: 10 g
% Carbs: 4.6 %
% Protein: 25.5 %
% Fat: 69.9 %
SmartPoints: 30


Notes on Nutritional Information

Nutritional information for the recipe is provided as a courtesy and is approximate only. We cannot guarantee the accuracy of the nutritional information given for any recipe on this site. 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.


Sodium: 866mg | Calcium: 520mg | Vitamin C: 8mg | Vitamin A: 645IU | Sugar: 5g | Fiber: 2g | Potassium: 826mg | Cholesterol: 225mg | Calories: 882kcal | Trans Fat: 3g | Monounsaturated Fat: 25g | Polyunsaturated Fat: 2g | Saturated Fat: 30g | Fat: 67g | Protein: 55g | Carbohydrates: 12g | Iron: 5mg

Please note that the nutritional information may vary depending
on the specific brands of products used. We encourage everyone to check specific
product labels in calculating the exact nutritional information.

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