Name: Double-Double Animal Style (In-N-Out Burger Copycat) Recipe
Prep time: 20 min
Cook time: 30 min
Total time: 50 min
Cuisine: American
Ingredients: 1 pound ground beef (20% fat grass-fed beef recommended); Salt & Pepper to taste; 1/2 cup yellow mustard; 1 Tbsp oil (canola or olive oil); 2 yellow onions, finely diced; ½ tsp salt; 1 Tbsp oil (olive oil recommended); 3 Tbsp water (for caramelizing); 1/3 cup mayo; 3 Tbsp ketchup; 1.5 Tbsp sweet pickle relish; 1 tsp sugar; 1 tsp white vinegar; 8 slices American Cheese (Land-O-Lakes deli sliced preferred); 4 soft plain hamburger buns; 4 tsp butter (about 1 tsp per bun); 16 dill pickle slices; 4 tomato slices (approx. 1/4" thick, large beefsteak tomato); 8 leaves iceberg lettuce, torn

↓ Jump to Recipe

If you've ever found yourself craving the iconic flavors of the West Coast’s beloved burger joint, you are in for a real treat with this Double-Double Animal Style (In-N-Out Burger Copycat) Recipe. This recipe brilliantly captures everything that makes the original a cult classic—the juicy double beef patties, melted American cheese, tangy special sauce, perfectly caramelized onions, and those signature pickles all sandwiched between a golden, toasted bun. It's comfort food at its finest, packed with layers of flavor and texture that will have you digging in bite after glorious bite. Whether you're a long-time fan or a burger enthusiast looking to recreate the magic at home, this recipe brings the essence of the famous Double-Double straight to your kitchen.

Ingredients You'll Need

In the image, two raw burger patties are cooking in a black pan filled with oil bubbles. Each patty is round and pinkish-red with bright yellow melted cheese spread unevenly over the top surfaces. The patties sit side by side with some space between them, and the pan's dark surface provides a shiny contrast to the colorful patties and cheese. The background is a white marbled texture. photo taken with an iphone --ar 4:5 --v 7

Creating this Double-Double Animal Style (In-N-Out Burger Copycat) Recipe isn’t just about throwing ingredients together; each component plays a vital role in crafting the perfect balance of flavor, texture, and visual appeal. From the savory ground beef to the tangy special sauce and sweet, caramelized onions, these ingredients are simple but essential allies in bringing this burger to life.

1 pound ground beef (20% fat grass-fed): This fatty blend ensures juicy and flavorful patties that mimic the classic bite.

½ cup yellow mustard: Adds a tangy zip to the beef patties during cooking for that signature sharpness.
8 Slices American Cheese (Land-O-Lakes Deli Sliced preferred): Melts beautifully over the patties for gooey cheesiness.
Salt & Pepper to taste: Simple seasoning that enhances every layer of flavor.

⅓ cup mayo: The creamy base for the special sauce to balance tang and richness.
3 tablespoon ketchup: Provides sweet tomato undertones in the special sauce.
1.5 tablespoon sweet pickle relish: Offers bursts of sweet and briny flavors, key for that Animal Style tang.

1 teaspoon sugar: Balances acidity and deepens the taste of the special sauce.
1 teaspoon white vinegar: Brings the perfect bit of acidity to brighten the special sauce flavors.
2 yellow onions (finely diced): Slowly caramelized to add rich sweetness and a slightly smoky depth.

½ teaspoon salt (for onions): Enhances the natural sweetness as onions caramelize.
1 tablespoon canola oil: The fat needed to gently cook and brown the onions without burning.
3 tablespoon water: Helps with the caramelization process in the onions, preventing them from drying out.

4 soft plain hamburger buns: Their softness and slight sweetness support the layers without overpowering.
4 teaspoon butter (about 1 teaspoon per bun): Used to toast the buns to golden perfection, adding richness.
16 dill pickle slices: Adding that vinegary crunch so iconic to Animal Style.

4 thick tomato slices (about ¼" thick): Bring a fresh, juicy contrast to the meat and cheese.
8 leaves iceberg lettuce (torn): Light and crisp, balancing the richness with refreshing crunch.

How to Make Double-Double Animal Style (In-N-Out Burger Copycat) Recipe

Step 1: Caramelize the Onions

The caramelized onions are the star sidekick to this recipe, providing a sweet and savory depth that's crucial for the Animal Style flavor profile. Start by heating one tablespoon of oil over medium-high heat, then toss in your finely diced onions with the salt. Lower the heat and be patient, stirring occasionally for about 15-20 minutes until the onions become soft and lightly golden. To hit that perfect balance, add water a tablespoon at a time, letting it evaporate completely to coax out the sugars and avoid burning. This slow cooking turns humble onions into luscious ribbons of flavor.

Step 2: Prepare the Special Sauce

While the onions caramelize, mix your mayo, ketchup, sweet pickle relish, sugar, and white vinegar in a bowl. Whisk everything until it’s smooth and well combined, then cover and refrigerate until burgers are ready. This sauce is creamy, tangy, and has just the right hint of sweetness that makes every bite unforgettable.

Step 3: Toast the Buns

Butter up your skillet and warm it over medium-high heat. Spread about one teaspoon of butter on the cut sides of each bun and toast them in the pan until they develop a golden-brown edge—crisp yet tender inside. Toasting locks in moisture and adds a subtle richness that perfectly cradles the juicy patties without getting soggy.

Step 4: Form and Cook the Beef Patties

Divide the ground beef into eight equal balls, then flatten each into thin patties roughly 4 inches in diameter, slightly larger than your buns. Season both sides with salt and pepper. Heat a lightly oiled skillet over medium-high heat until hot but not smoking. Place two patties at a time, seasoning the top side with salt, pepper, and a touch of yellow mustard for that special bite. Cook the first side until nicely browned (2-3 minutes), flip for about one minute more, then add a slice of cheese to each patty while still in the pan.

Step 5: Stack the Patties with Caramelized Onions

Place a heaping tablespoon of your lovingly caramelized onions on one cheesy patty, then stack the other patty on top to create the iconic double layer. The melting cheese, sizzling beef, and sweet onions meld together in perfect harmony. Remove from the heat and repeat with the remaining patties.

Step 6: Assemble the Double-Double Animal Style (In-N-Out Burger Copycat) Recipe

Build your masterpiece in this order: bottom bun, one heaping tablespoon of special sauce, four pickle slices, one thick tomato slice, two torn leaves of iceberg lettuce, the double meat and cheese stack crowned with onions, then top it all with the toasted bun. This order ensures every bite delivers a perfect balance of crunchy, creamy, tangy, and savory flavors.

How to Serve Double-Double Animal Style (In-N-Out Burger Copycat) Recipe

Three cheeseburgers are placed side by side on a light wooden board. Each cheeseburger has a soft, lightly toasted golden-brown bun on top. Under the bun, there is a melted yellow cheese layer covering a grilled burger patty with some char marks. Below the patty is a fresh green lettuce layer, followed by a thick red tomato slice. The bottom bun has a spread of creamy light pink sauce with some visible pickle slices. The setting is on a white marbled surface. photo taken with an iphone --ar 4:5 --v 7

Garnishes

Adding extra garnishes is optional but delightful. Pickles add extra crunch and tang, while fresh tomato slices provide juiciness and acidity that cut through the richness. Torn iceberg lettuce introduces crisp freshness, and if you want to bring a little extra heat, mild jalapeños or a dash of hot sauce can elevate the experience without overpowering.

Side Dishes

Serve your Double-Double Animal Style (In-N-Out Burger Copycat) Recipe with classic fries—homestyle, crinkle-cut, or even crispy sweet potato fries provide ideal contrast. A small side of tangy coleslaw or a light pickle salad also works beautifully to balance the indulgence of the burger.

Creative Ways to Present

For a fun twist, you can turn the burger into a platter with all the toppings served on the side allowing everyone to build their own. Alternatively, stack the burgers with extra cheese or add a fried egg on top for a decadent brunch option. Wrapping the burger in parchment paper, like the fast-food chains do, adds a nostalgic touch when serving guests.

Make Ahead and Storage

Storing Leftovers

If you have any leftovers from the Double-Double Animal Style (In-N-Out Burger Copycat) Recipe, store the patties and caramelized onions separately in airtight containers in the refrigerator. Keep the buns wrapped tightly to maintain freshness. This separation helps prevent sogginess and flavor loss.

Freezing

Freeze cooked beef patties wrapped in wax or parchment paper inside a freezer-safe bag to keep them fresh for up to three months. The special sauce freezes poorly, so make it fresh when possible. Buns also freeze well when tightly wrapped and can be thawed at room temperature.

Reheating

Reheat patties gently in a skillet over low heat to avoid drying them out, and warm buns separately in a toaster or oven to restore crispiness. To revive caramelized onions, reheat slowly on low in a pan, stirring frequently. Assemble the burger fresh after reheating all components for the best experience.

FAQs

What makes this Double-Double Animal Style different from a regular burger?

The key differences lie in the layering of two thin beef patties cooked with mustard, the addition of caramelized onions, the unique tangy special sauce, and the extra pickles all combined in a classic toasted bun. These elements create an explosion of flavors and textures not found in a basic burger.

Can I use a different type of cheese?

While American cheese is traditional due to its meltability and mild flavor, feel free to experiment with cheddar or pepper jack. Just keep in mind that American cheese best replicates the creamy texture iconic to In-N-Out's Double-Double.

Is there a vegetarian alternative for this recipe?

Absolutely! You can swap the beef with plant-based patties, ensuring you still caramelize onions and use the special sauce. The signature flavor comes from the combination of components, not just the meat.

How do I prevent buns from getting soggy?

Toast the buns generously with butter right before assembling. Also, place sauce and pickles strategically, and assemble right before serving to keep buns firm and flavorful.

Can I prepare any elements in advance?

Yes, caramelized onions and special sauce can be made a day ahead and stored in the refrigerator. This makes assembling your Double-Double Animal Style (In-N-Out Burger Copycat) Recipe quick and stress-free when it's burger time.

Final Thoughts

This Double-Double Animal Style (In-N-Out Burger Copycat) Recipe is a delicious homage to a classic that never goes out of style. It’s a burger that truly satisfies with every juicy bite, thanks to the thoughtful balance of elements and flavors lovingly crafted in your own kitchen. I encourage you to give it a try and see how easily you can capture that legendary taste—your taste buds will thank you for it!

Double-Double Animal Style (In-N-Out Burger Copycat) Recipe

Ingredients You'll Need