In-N-Out Copycat Animal Style Fries
Crispy Fries Smothered in Cheese, Grilled Onions & Signature Sauce
Animal Style Fries from In-N-Out Burger are legendary. Crispy fries are layered with melted American cheese, topped with deeply caramelized onions, and finished with a generous drizzle of a creamy, tangy sauce that balances sweetness, acidity, and richness. While the original can only be found at In-N-Out locations, this copycat recipe brings the experience straight to your kitchen—no road trip required.
The magic of Animal Style Fries lies in their contrast: crunchy fries meet silky cheese, sweet onions, and bold sauce. This recipe focuses on getting every component just right so the final dish tastes as close as possible to the real thing.
Ingredients (Serves 4)
For the Fries:
- 2½ lbs (1.1 kg) russet potatoes
- Cold water (for soaking)
- Neutral oil for frying (canola, peanut, or vegetable)
- Salt, to taste
For the Caramelized Onions:
- 2 large yellow onions, thinly sliced
- 2 tablespoons unsalted butter
- 1 tablespoon vegetable oil
- 1 teaspoon sugar (optional, for faster caramelization)
- Salt, to taste
For the Cheese Layer:
- 8–10 slices American cheese (classic and authentic)
- Optional: a splash of milk for smoother melting
For the Animal Style Sauce:
- ½ cup mayonnaise
- 3 tablespoons ketchup
- 2 tablespoons sweet pickle relish
- 1 teaspoon white vinegar
- 1 teaspoon sugar
- ½ teaspoon paprika
- ¼ teaspoon garlic powder
- ¼ teaspoon onion powder
- Salt and pepper, to taste
Step-by-Step Instructions
1. Prepare the Potatoes
Start by washing and peeling the russet potatoes. Cut them into thin, uniform fries—about ¼ inch thick. Consistency is important so they cook evenly.
Place the cut potatoes into a large bowl of cold water and let them soak for at least 30 minutes, or up to 2 hours. This step removes excess starch, which is key to achieving fries that are crisp on the outside and fluffy on the inside.
After soaking, drain the potatoes and pat them completely dry with clean kitchen towels or paper towels. Any moisture left on the potatoes can cause splattering and soggy fries.
2. Make the Animal Style Sauce
While the potatoes soak, prepare the sauce. In a bowl, whisk together the mayonnaise, ketchup, relish, vinegar, sugar, paprika, garlic powder, onion powder, salt, and pepper.
Taste and adjust seasoning if needed. The sauce should be creamy, slightly sweet, tangy, and savory. Cover and refrigerate for at least 20 minutes to let the flavors meld. This resting time makes a noticeable difference.
3. Caramelize the Onions
Heat a large skillet over medium-low heat. Add the butter and oil. Once melted, add the sliced onions and a pinch of salt.
Cook slowly, stirring every few minutes, allowing the onions to soften and gradually turn golden brown. This process takes 25–35 minutes and should not be rushed. If desired, add the sugar halfway through to encourage caramelization.
The onions are ready when they are deeply golden, soft, and sweet. Remove from heat and set aside.
4. Fry the Fries (Double-Fry Method)
Heat the oil in a large pot or deep fryer to 325°F (165°C). Fry the potatoes in small batches for 4–5 minutes, until they are tender but not browned. Remove and drain on a wire rack or paper towels.
Increase the oil temperature to 375°F (190°C). Fry the potatoes again in batches for 2–3 minutes, until golden brown and crispy.
Immediately season with salt while hot.
5. Assemble the Animal Style Fries
Preheat your oven broiler or set the oven to 400°F (200°C).
Spread the hot fries evenly on a baking sheet or oven-safe dish. Layer the American cheese slices over the fries, slightly overlapping them. For extra creaminess, you can drizzle a tablespoon or two of milk over the cheese.
Place the fries in the oven just until the cheese melts completely—about 2–3 minutes.
Remove from the oven and immediately spoon the caramelized onions generously over the melted cheese.
6. Finish with Sauce
Drizzle the Animal Style sauce generously over the fries and onions. Don’t be shy—this sauce is what ties everything together.
Serve immediately while hot, gooey, and irresistible.
Tips for Authentic Flavor
- American cheese is essential: It melts smoothly and mimics the original texture.
- Low and slow onions give the best sweetness and depth.
- Double frying ensures maximum crispiness.
- Serve immediately: Animal Style Fries are best fresh and hot.
Variations & Add-Ons
- Animal Style Loaded Fries: Add chopped grilled hamburger patties.
- Spicy Animal Fries: Mix hot sauce or chili paste into the sauce.
- Baked Version: Oven-bake fries at high heat, though texture will differ.
- Cheese Upgrade: Mix American with cheddar for a bolder flavor.
How to Serve
These fries are perfect as a shareable appetizer, game-day snack, or indulgent side dish. Pair them with burgers, milkshakes, or a cold soda for the full drive-thru experience.
Storage & Reheating
Animal Style Fries are best eaten immediately. If necessary, store leftovers in the refrigerator for up to one day. Reheat in the oven at high heat to revive some crispness, though the fries will never be quite the same as fresh.
Final Thoughts
In-N-Out Copycat Animal Style Fries are the ultimate comfort food: crispy, cheesy, savory, and packed with flavor. By mastering each component—fries, onions, cheese, and sauce—you can recreate this iconic fast-food favorite at home with impressive accuracy.
This recipe proves that with a little time and care, restaurant classics can be transformed into unforgettable homemade dishes. Once you try them, these Animal Style Fries may become a permanent craving in your kitchen.