Description:

These Low-Carb Copycat In-N-Out Flying Dutchman Burgers turn a classic burger craving into a bun-free, protein-packed meal. Juicy seasoned beef patties are layered with melted cheese and tucked between tender, golden caramelized onion rounds instead of traditional bread.

The onion “buns” bring natural sweetness and a beautifully browned exterior, while the beef and cheese deliver plenty of savory flavor and protein. An optional sugar-free ketchup sauce adds tanginess without turning this keto-friendly burger into a heavy carb-loaded meal.

With approximately 30–35g of protein per burger, this recipe is a satisfying choice for high-protein and low-carb meal plans.

Can This Low-Carb Flying Dutchman Burger Support Weight Loss Goals?

This burger can fit into a calorie-conscious eating pattern when portions and the rest of the meal are considered. The beef and cheese provide substantial protein, while replacing a traditional bun with grilled onion rounds reduces the amount of bread-based carbohydrate. Protein can also make a meal more satisfying, which may make it easier for some people to stay consistent with their overall eating plan. The recipe itself provides approximately 30–35g protein per burger, although calories and fat will vary according to the beef and cheese selected.

Does Low-Carb Flying Dutchman Burger Fit a High Protein Lifestyle?

Yes, this recipe is especially suitable for a high-protein lifestyle because lean ground beef and cheese form its main protein sources.
Each burger provides approximately 30–35g protein, making it substantially protein-focused for a single serving.
The onion rounds contribute carbohydrates, so the exact net-carb amount depends on the onion size and amount used.
Using leaner beef and a sugar-free ketchup in the sauce can help keep the recipe more aligned with a low-carb meal plan.

My Personal Experience

The caramelized onion rounds make a surprisingly satisfying bun replacement.
They become soft, golden, and naturally sweet while holding the cheesy beef stack together.
Their browned edges add extra flavor that a plain lettuce wrap cannot provide.
The thin beef patties cook quickly and stay flavorful.
Dividing the beef into four thin patties makes it easy to create two double-patty burgers.
The thinner shape also allows the cheese to melt beautifully between the patties.
The melted cheese brings the whole burger together.
Adding cheese near the end of cooking creates a creamy layer between the hot beef patties.
American or cheddar cheese both work well for a rich, savory finish.
The optional sauce adds a tangy contrast.
Mayonnaise, sugar-free ketchup, mustard, pickles, and garlic powder create a creamy, slightly sharp sauce.
A small amount is enough to complement the beef without overpowering the caramelized onions.
It feels like comfort food without the traditional bun.
The combination of beef, cheese, and browned onions keeps the burger hearty and satisfying.
It works especially well when you want a high-protein burger-style dinner with fewer bread-based carbs.

Perfect For:

This recipe is ideal for high-protein meals, low-carb recipes, keto diet plans, easy weeknight dinners, burger nights, meal-prep lunches, family dinners, summer cookouts, and quick protein-focused meals.

It can also work as a hearty high-protein lunch or dinner when paired with a fresh cucumber salad, leafy green salad, roasted broccoli, or another low-carb vegetable. The recipe is more appropriate as a savory meal than as a high-protein dessert or sweet snack.

Why You’ll Love This Recipe:

No traditional burger bun required
Thick caramelized onion rounds replace the bread while adding sweetness and savory depth.
This keeps the recipe focused on beef, cheese, and vegetables.
High in protein
Lean ground beef provides the majority of the recipe’s protein, with additional protein coming from cheese.
The source estimates approximately 30–35g protein per burger.
Big burger flavor in a simple recipe
Garlic, onion powder, black pepper, Worcestershire sauce, beef, cheese, and caramelized onions create layers of flavor.
You do not need a long ingredient list to make the burger satisfying.
Quick enough for weeknights
The onion rounds take several minutes to caramelize, while the thin patties cook quickly afterward.
The complete recipe can be prepared without complicated techniques.
Easy to customize
You can use American or cheddar cheese and adjust the optional sauce to your preferred flavor.
Jalapeños, pickles, or extra mustard can also add a different finishing note.

Common Mistakes to Avoid:

Cooking the onions over high heat — High heat can burn the outside before the onion becomes tender and caramelized; medium-low heat gives better color and texture.
Making the patties too thick — Thick patties take longer to cook and do not create the thin double-patty texture this recipe is designed for.
Overmixing the ground beef — Mixing too aggressively can make the finished patties dense instead of tender.
Adding cheese too early — Add the cheese after flipping and near the end so it melts without becoming overly browned or sticking to the pan.

Required Equipment:

Large nonstick skillet — Helps caramelize the onion rounds evenly and cook the beef without excessive sticking.
Spatula — Makes flipping the thin beef patties and assembling the burger easier.
Mixing bowl — Provides enough space to gently season and combine the ground beef.
Small bowl — Keeps the optional low-carb sauce easy to mix and portion.
Sharp knife — Creates thick, even onion rounds that can function as sturdy “buns.”
Instant-read thermometer — Helps verify that ground beef reaches 160°F/71°C internally.

Storage Instructions:

Store leftover cooked beef patties and caramelized onions in separate airtight containers in the refrigerator for up to 3 days for best quality. Keep the sauce refrigerated in a small sealed container.

For freezing, the cooked beef patties can be wrapped individually and frozen for up to 2 months. Thaw them in the refrigerator before reheating. Caramelized onions can technically be frozen, but their texture may become softer after thawing, so they are best prepared fresh when possible.

For reheating, warm the beef and onions separately in a skillet over medium-low heat until heated through, then add the cheese and assemble. Keeping the components separate helps preserve the texture and keeps this protein-focused meal easy to portion.

Recipe Details:

Preparation Time: 10 minutes
Cooking Time: 15 minutes
Total Time: 25 minutes
Servings: 2 burgers
Best Season for This Recipe: All-season
Course: Dinner / Lunch
Cuisine: American-inspired
Difficulty: Easy
Total Calories (Per Serving): Approximately 350–450 calories, depending on beef, cheese, oil, and sauce quantities.

The linked recipe specifies 10 minutes of preparation, 15 minutes of cooking, and 2 burgers per batch. Its nutrition information is given as an approximate range rather than a complete calorie calculation.

Short 3-Line Description:

Juicy seasoned beef patties and melted cheese are tucked between golden caramelized onion “buns.”
This low-carb burger delivers approximately 30–35g of protein per serving.
A tangy optional sauce finishes this easy keto-inspired dinner with plenty of burger flavor.

📝 Ingredients:

For the Burgers:

8 oz (225 g) lean ground beef
2 slices American cheese or cheddar cheese
½ teaspoon salt
¼ teaspoon black pepper
½ teaspoon garlic powder
½ teaspoon onion powder
1 teaspoon Worcestershire sauce — Optional

For the Onion “Buns”:

1 large yellow onion
1 teaspoon olive oil or butter
1 pinch salt
1 teaspoon water — Use only if the onions begin sticking or browning too quickly

Optional Low-Carb Sauce:

2 tablespoons mayonnaise
1 tablespoon sugar-free ketchup
1 teaspoon yellow mustard
1 teaspoon finely chopped pickles
¼ teaspoon garlic powder

These quantities follow the linked recipe.

Directions:

1. Prepare the Onion “Buns”

Peel the yellow onion and cut it into thick ½–¾-inch rounds.

Carefully separate several of the larger outer rings, keeping them intact enough to hold the burgers.

2. Caramelize the Onions

Heat a large nonstick skillet over medium-low heat and add the olive oil or butter.

Place the onion rounds into the skillet and lightly season with salt. Cook for 5–7 minutes per side, turning gently, until they are soft, golden brown, and caramelized.

Texture cue: The onions should be tender enough to bend slightly but sturdy enough to hold the burger.

If they begin sticking or browning too quickly, add 1–2 teaspoons water and lower the heat.

3. Season the Beef

Add the ground beef, salt, black pepper, garlic powder, onion powder, and optional Worcestershire sauce to a bowl.

Mix gently just until the seasonings are distributed.

High-protein cooking tip: Use lean ground beef if you want to emphasize protein while keeping the overall fat content lower.

4. Form the Patties

Divide the seasoned beef into 4 thin patties.

The thin patties are important because two patties will be stacked together to create each burger.

5. Cook the Beef

Heat the same skillet over medium-high heat.

Place the patties in the hot skillet and cook for approximately 2–3 minutes per side, or until cooked through to a safe internal temperature of 160°F/71°C for ground beef.

Visual cue: The patties should have browned edges and a cooked-through center.

6. Add the Cheese

Place one cheese slice on two of the cooked patties.

Immediately place the remaining patties on top and cook for another 30–60 seconds, allowing the cheese to melt between the layers.

7. Prepare the Optional Sauce

While the burgers cook, combine the mayonnaise, sugar-free ketchup, yellow mustard, chopped pickles, and garlic powder in a small bowl.

Stir until smooth and evenly combined.

8. Assemble the Burgers

Place one caramelized onion round on each serving plate.

Add the double-patty cheese-filled burger stack, then spread or drizzle with a small amount of sauce.

Finish with another caramelized onion round on top.

If the onion rings are not large enough, overlap several smaller onion pieces to create a sturdy top and bottom.

9. Serve Immediately

Serve the burgers while the beef is hot and the cheese is still melted.

For a more complete high-protein meal, pair one burger with a fresh cucumber salad, leafy greens, or another low-carb vegetable.

Nutrition Facts (Per Serving – Approximate):

The linked recipe estimates 30–35g protein and 8–12g total carbohydrates per burger, with the exact values depending largely on onion quantity, sauce, beef, and cheese.

Calories: Approximately 350–450 kcal
Fats: Approximately 20–28g
Cholesterol: Approximately 80–105mg
Sodium: Approximately 650–900mg
Potassium: Approximately 450–600mg
Total Carbohydrates: Approximately 8–12g
Fiber: Approximately 1–2g
Net Carbs: Approximately 6–10g
Sugars: Approximately 3–5g
Protein: Approximately 30–35g
Calcium: Approximately 180–250mg

Nutrition note: These are approximate estimates, not laboratory values. The original recipe specifically gives protein at approximately 30–35g and carbohydrates at approximately 8–12g per burger; the remaining values vary with the specific beef, cheese, sauce, oil, and onion used.

Notes:

Storage: Keep cooked patties, onions, and sauce in separate airtight containers in the refrigerator for up to 3 days.
Freezing: Freeze cooked beef patties separately for up to 2 months for best quality; onion texture may soften after freezing.
Reheating: Reheat patties and onions separately in a skillet over medium-low heat.
Food safety: Ground beef should reach 160°F/71°C internally.
Allergy notes: Cheese and mayonnaise may contain milk and egg; check product labels if allergies are a concern.
Lower-carb option: Reduce the amount of onion and use sugar-free ketchup in the sauce.
Protein boost: Choose leaner ground beef and pair the burger with a Greek-yogurt-based ranch dip or another protein-rich side.
Flavor boost: Add pickles, jalapeños, extra mustard, or a little hot sauce to create a sharper, spicier burger.
Classic-style option: Keep the topping combination simple with beef, cheese, caramelized onions, and a small amount of sauce.

Frequently Asked Questions:

1. Is this Flying Dutchman burger keto-friendly?

It can fit many low-carb or keto-style meal plans, but the exact carbohydrate amount depends mainly on the onion and sauce used.

2. How much protein is in one burger?

The linked recipe estimates approximately 30–35g of protein per burger.

3. Can I use cheddar instead of American cheese?

Yes, cheddar works well and gives the burger a sharper, more pronounced cheese flavor.

4. Why use onion instead of a burger bun?

The caramelized onion rounds provide a naturally sweet, savory alternative to traditional bread while adding moisture and flavor.

5. Can I make the burgers ahead of time?

Yes, the cooked patties and onions can be refrigerated separately and reheated before assembly.

6. How can I increase the protein?

Use lean ground beef and pair the burger with a protein-rich side such as Greek-yogurt-based ranch dip or another lean protein source.