How to Make the Ultimate In-N-Out Double-Double Animal Style Burger at Home
Give home cooking a gourmet twist with mustard-seared patties and sweet caramelized onions.
How to Make In-N-Out’s Double-Double Animal Style Burger at Home
Few burgers inspire devotion like In-N-Out’s legendary Double-Double Animal Style Burger. With its mustard-fried beef patties, melty American cheese, sweetly caramelized onions, signature sauce, and fresh toppings nestled between toasted buns, this burger encapsulates everything iconic about West Coast fast food. Although shrouded in mystique thanks to a not-so-secret menu, you can recreate this smash-hit at home with straightforward ingredients and a few clever techniques.
What Is a Double-Double Animal Style Burger?
The “Double-Double” refers to two beef patties and two slices of American cheese. “Animal Style” designates several signature upgrades:
- Mustard-fried beef patties
- Generous helping of caramelized onions
- Extra pickles
- Additional signature burger sauce
As a result, the Animal Style is a maximalist, flavor-packed variant that still celebrates the simplicity of fresh American classics.
Ingredient Spotlight & Preparation Tips
Authenticity starts with attention to detail in your choice of ingredients and preparation.
- Ground Beef: For best results, use 80/20 blend (80% lean, 20% fat) for juicy patties. Freshly ground is ideal for optimal flavor and texture.
- American Cheese: Deli-sliced American cheese melts beautifully; avoid individually wrapped singles for richer flavor.
- Buns: Choose soft hamburger buns. Toast them in butter for extra crispness and flavor.
- Lettuce: Iceberg provides unparalleled freshness and crunch, crucial to contrast the richness of the burger.
- Tomato: Thinly slice for stability. Season slices with a pinch of salt for enhanced flavor.
- Pickles: Dill pickle slices add essential acidity and crunch.
- Onions: Caramelize yellow or white onions slowly in oil and a splash of water (see section below for method).
- Mustard: Classic yellow mustard—that gets fried directly into the patty—imparts the Animal Style’s tangy backbone.
- Burger Sauce: Combines mayonnaise, ketchup, sweet pickle relish, and a touch of vinegar (see recipe below).
Essential Equipment
- Cast iron skillet or griddle (for perfect searing)
- Burger press or stiff spatula
- Sharp knife for slicing toppings
- Mixing bowls (for sauce and onions)
- Spatula for flipping burgers and scraping onions
Step-by-Step Assembly: Double-Double Animal Style Burger
Follow this comprehensive process for results that rival the original.
1. Prepare the Burger Sauce
- Ingredients:
- 1/2 cup mayonnaise
- 3 tablespoons ketchup
- 2 tablespoons sweet pickle relish
- 1 teaspoon yellow mustard
- 2 teaspoons white vinegar
- Optional: 2 teaspoons sugar for additional sweetness
- Salt and pepper to taste
- Directions: Mix all ingredients in a bowl until smooth. Adjust to taste, then refrigerate until needed.
2. Caramelize the Onions
- Ingredients:
- 2 large onions, diced
- 1 tablespoon olive oil
- Salt to taste
- 3 tablespoons water, divided
- Directions:
- Heat olive oil in a skillet over medium-high heat.
- Add onions and salt, stir to combine.
- Lower heat to medium-low and cook, stirring often, for 15–20 minutes until onions are golden brown.
- Increase heat to medium-high, add 1 tablespoon water, let evaporate and repeat twice, until onions are deep brown and sticky.
- Set aside in a small bowl until burger assembly.
3. Toast the Buns
- Spread a thin layer of butter on each bun half.
- Toast on a skillet or griddle until golden and crisp.
- Set aside and keep warm.
4. Prepare Burger Toppings
- Wash and dry iceberg lettuce leaves.
- Thinly slice tomatoes and season with a pinch of salt.
- Slice pickles if using whole pickles, or have dill pickle slices ready.
5. Form and Season Patties
- Form 8 balls, each about 2.5 ounces, from your ground beef.
- Flatten gently and season with kosher salt and black pepper.
- Cover and chill until ready to cook for minimal handling.
6. Smash and Sear the Patties (Animal Style Technique)
- Heat a cast iron griddle or skillet over high heat until nearly smoking.
- Place 2 beef balls per burger (as many as your skillet allows) and flatten instantly using a burger press or stiff spatula over parchment paper.
- Immediately top each patty with a generous pile of thinly sliced onions and a teaspoon of yellow mustard—mustard is seared right into the meat.
- Sear for about 1–2 minutes, until a crust forms and liquid rises up.
- Flip each patty with a stiff spatula, keeping onions on top.
- Instantly top with a slice of American cheese.
- Cook for another 1–2 minutes until cheese melts and patties are cooked through but still juicy.
7. Burger Assembly
- On each toasted bottom bun, spread a generous layer of burger sauce.
- Add pickles, lettuce leaf, and tomato slice.
- Stack two cheese-topped mustard-fried patties, with onions melded into the cheese.
- Finish with an extra spoonful of caramelized onions for maximum Animal Style impact.
- Spread more sauce on the top bun, then close and gently press.
Tip: Prepare the bottom buns with toppings before cooking the burgers so you can assemble quickly while the patties are fresh off the heat.
Serving Suggestions & Variations
- Serve hot, with a side of crispy fries or onion rings.
- Swap iceberg for shredded lettuce for a different crunch profile.
- Use spicy pickles or add a few jalapeños for extra heat.
- Double up the caramelized onions for a true Animal Style overload.
Comparison Table: Classic vs. Animal Style Burger
| Feature | Classic Double-Double | Animal Style |
|---|---|---|
| Patties | 2 grilled beef patties | 2 mustard-fried beef patties |
| Cheese | 2 slices American cheese | 2 slices American cheese |
| Sauce | Standard burger sauce | Extra sauce, tangier flavor |
| Onions | Raw or grilled onions | Caramelized onions only |
| Pickles | None or standard option | Extra pickles |
| Crisp Lettuce & Tomato | Included | Included, with extra freshness |
Pro Tips for Burger Success
- Fat Ratio Matters: Stick to 80/20 ground beef for a juicy, flavorful burger; leaner blends will cause dryness.
- Smash for Texture: Smashing burgers creates crisp edges and juicy centers—the trademark In-N-Out bite.
- Onions Need Patience: Proper caramelization is essential for that sticky, sweet flavor. Resist rushing and let the onions cook slowly.
- Layering Counts: Build your burgers from the bottom up—bun, sauce, pickles, lettuce, tomato, patties, onions, then top bun—for a perfectly structured bite.
- Serve Immediatley: Assemble and serve as soon as the patties are done for optimal juiciness and texture.
Frequently Asked Questions (FAQs)
Q: Can I make these burgers ahead of time?
A: For best results, make and serve immediately. Caramelized onions and sauce can be prepped ahead, but cook patties fresh for juiciest results.
Q: What is the difference between “Animal Style” and regular burgers?
A: Animal Style refers to the addition of mustard-fried patties, extra pickles, caramelized onions, and extra sauce not found on standard Double-Doubles.
Q: What blend of beef should I use?
A: Use ground beef with an 80/20 lean-to-fat ratio for maximum juiciness and flavor.
Q: Can I substitute another cheese?
A: American cheese yields the signature creamy melt; mild cheddar is acceptable but may alter taste and melt quality.
Q: How long do the onions take to caramelize?
A: True caramelization takes 15–25 minutes over medium-low heat with regular stirring and water additions for deep flavor.
Nutrition Information (Per Burger)
- Calories: Approx. 660–720
- Protein: ~35g
- Carbohydrates: ~45g
- Fat: ~38g
(Values are estimates and will vary based on chosen ingredients and portions.)
Conclusion: Bringing In-N-Out Home
Crafting the Double-Double Animal Style Burger at home is not just about copying a recipe—it’s about celebrating classic American flavors with attention to detail and nostalgia. Whether you’re far from the nearest In-N-Out or hungry to perfect your burger game, these straightforward steps unlock the full, maximalist Animal Style experience.
Printable Recipe Summary
- Prep Time: 30 minutes
- Cook Time: 20 minutes
- Total Time: 50 minutes
- Servings: 4 Double-Double Animal Style Burgers
Related Recipes
- Classic Smash Burger
- Spicy Animal Style Burger
- Homemade Shake Shack-style Burger
Burger Glossary
- Smash Burger: Thin burger patty cooked by pressing onto a hot surface for crisp edges.
- Caramelized Onions: Onions slowly sautéed until deep brown and sweet.
- Animal Style: In-N-Out term for mustard-fried patties, caramelized onions, and extra toppings.
References
- https://the-kitchencoalition.com/double-double-animal-style-smash-burgers/
- https://www.ameliaisnotachef.com/recipes/in-n-out-double-double-animal-style
- https://www.youtube.com/watch?v=6Pw0q6869Q4
- https://thatsdeelicious.com/double-double-animal-style/
- https://topsecretrecipes.com/foodhackerblog/in-n-out-burger-double-double/
- https://www.forevernomday.com/recipe/copycat-in-n-out-double-double-animal-style/
- https://nolimitcooking.com/2023/12/13/in-n-out-animal-style-cheeseburger-copycat/
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