There’s a unique satisfaction that comes from recreating beloved fast-food classics right in your own kitchen. Whether it’s the tangy zest of a spicy chicken sandwich or the ingenious layers of a crunchwrap, homemade versions consistently surpass their restaurant counterparts. Using fresher ingredients, cooking on a budget, and, most importantly, achieving a superior taste are just a few of the compelling reasons to embrace the art of the copycat recipe. For many, a trip to the West Coast isn’t complete without a stop at In-N-Out Burger. As someone who lives in the Midwest, I understand that craving for a truly exceptional burger that simply isn’t available locally. That’s why I embarked on a mission to perfect a copycat In-N-Out Animal Style Burger, and the results were nothing short of spectacular. Every bite delivered the authentic, irresistible flavors of the original, but with the added bonus of knowing exactly what went into it. It’s a guilt-free indulgence that captures the essence of In-N-Out magic. Allow me to guide you through the process of making this phenomenal burger in your own home.
If you’re as passionate about replicating fast food favorites as I am, you absolutely must try the Big Mac Crunchwrap. It’s an incredible fusion, combining the signature flavors of a McDonald’s Big Mac with the innovative crunch of a Taco Bell-inspired wrap—a true game-changer for your recipe repertoire.

Table of Contents
- The Secret is in the Sauce: Making Your In-N-Out Burger Sauce
- Mastering the Grill: Perfecting Your Copycat In-N-Out Burgers
- Pro Tip for Burger Patties
- Frequently Asked Questions: Your Copycat Burger Guide
- Similar Burger and Grilling Recipe Ideas
- Copycat In-N-Out Burger Recipe
The Secret is in the Sauce: Making Your In-N-Out Burger Sauce
One of the most distinctive and essential components of a truly authentic In-N-Out Burger, especially the Animal Style version, is its legendary secret sauce. This isn’t just any condiment; it’s the magical element that brings all the flavors together, imparting a delightful balance of sweet, tangy, and savory notes that makes each bite unforgettable. The good news is that recreating this iconic sauce at home is surprisingly simple, utilizing ingredients you likely already have on hand, making it incredibly accessible for any home cook.
To whip up this delicious dressing, gather your ingredients: ketchup, mayonnaise, sweet relish, apple cider vinegar, and a touch of sugar. The combination of these common staples creates a complex flavor profile that perfectly mimics the original. In a medium-sized mixing bowl, simply combine 1/4 cup of ketchup, 1/4 cup of mayonnaise, 2 tablespoons of sweet relish, 1 tablespoon of apple cider vinegar, and 1 tablespoon of sugar. Whisk all these ingredients thoroughly until they are well incorporated and the sauce is smooth and creamy. Once mixed, set the sauce aside. Allowing it to rest for at least 15-20 minutes, or even better, refrigerating it for an hour, gives the flavors time to meld and deepen, enhancing its overall taste and readiness for your burgers. This sauce is truly the heart of the Animal Style experience, and mastering it is the first step to your homemade In-N-Out success.


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Mastering the Grill: Perfecting Your Copycat In-N-Out Burgers
Whether you’re a fan of the classic single patty or prefer the indulgence of a double-double, the thin, flavorful patties are what truly make an In-N-Out Burger stand out. But the magic doesn’t stop at the beef. The “Animal Style” signature is truly defined by two elements: the sauce (which we’ve already covered) and the gloriously caramelized sautéed onions. Let me walk you through how to achieve these amazing components for your perfect homemade burger.
The Art of Caramelized Onions
Before we even think about the beef, let’s tackle those essential sautéed onions. They add a sweet, savory depth that is absolutely crucial for an authentic Animal Style experience. Begin by preheating your griddle or a flat-top grill to a medium-low heat. Drizzle a generous amount of olive oil over the cooking surface. Take one medium-sized white onion, dice it finely, and spread it evenly across the griddle. Sauté these onions patiently for about 15-20 minutes, stirring occasionally, until they become beautifully soft, translucent, and deeply caramelized, taking on a rich golden-brown hue. The key here is low and slow heat to allow the natural sugars in the onion to develop without burning. Once they reach that perfect tenderness and color, push them to the side of the griddle and reduce the burner to its lowest setting. This will keep them warm and ready to crown your burgers without overcooking.

Crafting the Perfect Patties
Now, for the star of the show: the beef patties. For this recipe, I recommend using about 1 pound of ground beef. The ideal ratio for a juicy yet crispy smash burger is 80% lean to 20% fat. This balance ensures the patties remain moist while achieving that desired crust. Divide your pound of ground beef into six equal portions, about 3 ounces each. Gently roll each portion into a loose round ball – don’t compress them too much at this stage, as we’ll be smashing them. The goal is to keep them tender. Feel free to adjust the fat content to your personal preference, but the 80/20 blend truly delivers on flavor and texture for this style of burger.
With your onions warming on the side, increase the griddle heat to medium. Place your beef balls onto the hot surface. Immediately, using a sturdy spatula, smash each beef ball down firmly and quickly into a thin, even patty. The trick here is to apply consistent pressure to create maximum surface contact with the griddle, which is essential for developing that signature crispy crust. This technique, known as the “smash burger” method, locks in juices while creating incredible texture.
Pro Tip for Burger Patties
- To prevent the ground beef from sticking to your spatula when smashing, place a small piece of parchment paper over each beef ball before pressing down. This creates a barrier, allowing for a clean smash every time and an easy release from the spatula. This simple trick saves you from frustrating clean-up and ensures perfectly formed patties.
Once smashed, it’s time to season and flavor your patties. Generously sprinkle each side with Dad’s All Purpose seasoning, ensuring an even coat. Then, here’s a crucial step straight from the In-N-Out playbook: squirt a thin line of yellow mustard onto the top of each patty. Yes, yellow mustard! This isn’t just for flavor; as the patty cooks, the mustard helps to form an incredibly savory and slightly tangy crust, adding another layer of complexity that sets these burgers apart. Grill each patty for approximately 2 minutes per side. This short, intense cook time is ideal for thin smash burgers, ensuring they are cooked through but still juicy. Towards the very end of the cooking process, place a slice of American cheese over each patty. Allow the cheese to melt into a gooey, savory blanket over the hot beef before carefully removing the patties from the griddle.

Assembling Your Animal Style Masterpiece
With all your components ready, it’s time for the grand assembly of your delicious copycat In-N-Out Animal Style Burger. The order of operations is key to the authentic experience. First, lightly toast your hamburger buns. This adds a crucial textural element and prevents the bun from becoming soggy under the juicy toppings. Once toasted, spread a generous layer of your homemade Animal Style sauce on both the top and bottom halves of the bun. Next, lay down a crisp bed of fresh lettuce, followed by a slice or two of ripe, juicy tomato. Now, for the star: place one or two of your perfectly grilled, cheesy patties onto the bottom bun. Pile a hearty scoop of those sweet, caramelized sautéed onions directly on top of the patties. Finally, add a little extra drizzle of that irresistible Animal Style sauce over the onions and patty, and cap it all with the top bun. Serve immediately and prepare to savor every single bite of this incredible homemade creation!
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Frequently Asked Questions: Your Copycat Burger Guide
While this recipe focuses on ground beef burgers, it’s a great question for any grill master! The best cut of steak depends entirely on your grilling method and desired outcome. For hot and fast grilling, like searing on a griddle or high-heat grill, look for cuts with good marbling such as a Ribeye or New York Strip. These cuts are tender and flavorful with quick cooking. If you’re aiming for a slower cook, like a roast or a stew, opt for cheaper, meatier cuts that benefit from longer cooking times to break down connective tissues, such as a Chuck Roast or Brisket. Always consider how you plan to cook before choosing your cut.
Absolutely! Most recipes, including this copycat In-N-Out burger, can be successfully replicated using standard kitchen equipment. You don’t need a large outdoor grill or a dedicated griddle to achieve fantastic results. For the patties, a heavy-bottomed cast-iron skillet or any large frying pan on your stove top will work perfectly for the smash burger technique. Just ensure the pan is preheated to medium-high to get that crucial sizzle and crust. For the sautéed onions, any skillet will do, just follow the low and slow method. The key is consistent heat and proper technique, regardless of your specific cooking surface.
Yes, you certainly can! The Animal Style sauce can be made up to 2-3 days in advance and stored in an airtight container in the refrigerator. In fact, making it ahead often allows the flavors to meld beautifully, making it even more delicious. The caramelized onions can also be prepared a day ahead and gently reheated on the stove or in the microwave before assembly. This prep-ahead strategy makes assembling your burgers on cook-day much quicker and easier, especially when entertaining.
Similar Burger and Grilling Recipe Ideas: Expand Your Menu
Beef
Copycat In-N-Out Burger
Chicken & Turkey
Thai Inspired Chicken Burgers
Beef
Chorizo Burger
Beef
The Long Mac
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Rating: 4.44 out of 5 stars from 16 votes.
Copycat In-N-Out Burger
Maciek Zurawski
15 minutes
20 minutes
3 People
Ingredients
- 1 lb Ground beef (preferably 80% lean / 20% fat)
- 6 slices American Cheese
- 6 Hamburger buns
- 1 White onion (medium-sized, for sautéing)
- 1 tbsp Yellow mustard
- 1 tbsp Dad’s All Purpose seasoning (or your favorite burger seasoning)
- Olive oil (for griddle/sautéing onions)
- Fresh lettuce (shredded or whole leaves)
- Sliced tomatoes
For the Homemade In-N-Out Sauce:
- 1/4 cup Ketchup
- 1/4 cup Mayonnaise
- 2 tbsp Sweet relish
- 1 tbsp Apple cider vinegar
- 1 tbsp Sugar
Instructions
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Begin by preparing the signature In-N-Out sauce. In a mixing bowl, combine the ketchup, mayonnaise, sweet relish, apple cider vinegar, and sugar. Whisk thoroughly until all ingredients are well blended and smooth. Set the sauce aside to allow the flavors to meld. You can even refrigerate it for an hour for a deeper taste.
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Next, prepare the caramelized onions. Preheat your griddle or a large frying pan to medium-low heat. Drizzle a small amount of olive oil onto the cooking surface. Dice the white onion finely and spread it onto the griddle. Sauté the onions for approximately 15-20 minutes, stirring occasionally, until they become soft, translucent, and beautifully caramelized with a golden-brown color. Once done, move the onions to the side of the griddle and reduce the heat to low to keep them warm.
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Divide your 1 lb of ground beef into six approximately 3 oz round balls. Avoid overworking the meat to keep it tender.
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Increase the griddle heat to medium. Place the beef balls onto the hot griddle. Using a sturdy spatula (and a piece of parchment paper to prevent sticking, if desired), firmly smash each beef ball into a thin, even patty. Ensure good contact with the griddle for maximum crust development.
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Season the smashed patties generously with Dad’s All Purpose seasoning. Immediately after smashing, apply a thin line of yellow mustard across the top of each patty. The mustard adds flavor and contributes to a fantastic crust.
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Cook the patties for about 2 minutes per side. Once flipped, allow them to cook for another 2 minutes. In the final moments of cooking, place a slice of American cheese on top of each patty, allowing it to melt completely over the hot beef before removing the patties from the griddle.
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To assemble your Copycat In-N-Out Animal Style Burger: Lightly toast your hamburger buns. Spread a generous layer of the homemade sauce on both the top and bottom halves of the bun. Layer with fresh lettuce and sliced tomato. Place one or two of your cheesy patties onto the bottom bun, followed by a hearty scoop of the sautéed onions. Drizzle a little more Animal Style sauce, then top with the other half of the bun. Serve immediately and enjoy your homemade fast-food classic!
Nutrition Information (per serving, estimated)
Calories: 974 kcal | Carbohydrates: 61g | Protein: 43g | Fat: 61g | Saturated Fat: 22g | Polyunsaturated Fat: 11g | Monounsaturated Fat: 21g | Trans Fat: 2g | Cholesterol: 157mg | Sodium: 1666mg | Potassium: 696mg | Fiber: 3g | Sugar: 20g | Vitamin A: 639IU | Vitamin C: 5mg | Calcium: 607mg | Iron: 7mg
(Nutritional information is an estimate and may vary based on specific ingredients and preparation methods.)
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