In-N-Out Animal Style Fries (Copycat Recipe)
If you’ve ever been to In-N-Out Burger, you know that Animal Style Fries are the ultimate secret menu indulgence. These crispy fries are loaded with melted cheese, grilled onions, and tangy spread that creates the perfect salty-sweet-savory combo.
This copycat recipe brings that iconic West Coast flavor right to your kitchen. You’ll get restaurant-quality results with simple ingredients and easy techniques that anyone can master.
Whether you’re craving a late-night snack or planning game day eats, these Animal Style Fries deliver big flavor in every bite.
What Makes Fries “Animal Style”?
Animal Style is In-N-Out’s famous preparation that transforms regular fries into something extraordinary. The signature combination includes melted American cheese, caramelized grilled onions, and their special spread (similar to Thousand Island dressing).
The magic happens when everything comes together while the fries are still hot. The cheese melts into every crevice, the onions add sweetness, and the spread brings tang and creaminess.
This style originated as a secret menu item but became so popular that it’s now a cult favorite across California and beyond.
Ingredients You’ll Need
The beauty of this recipe is its simplicity. You only need a handful of ingredients, most of which you probably already have in your fridge.
For the fries, use fresh russet potatoes or quality frozen fries for convenience. The toppings require American cheese (it melts best), yellow onions for caramelizing, and ingredients for the special spread.
The spread is a simple mix of mayo, ketchup, and relish that mimics In-N-Out’s iconic sauce perfectly.
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How to Make the Special Spread
The secret spread is what ties everything together. Mix mayonnaise, ketchup, sweet pickle relish, white vinegar, and a pinch of sugar until smooth.
For best results, make this ahead and refrigerate for at least 30 minutes. This allows the flavors to meld and develop that authentic taste.
You can adjust the ratios to your preference—add more relish for tang or more mayo for creaminess.
In-N-Out Animal Style Fries (Copycat Recipe)
Course: DinnerCuisine: AmericanDifficulty: Easy4
servings15
30
minutes45
minutesCrispy fries loaded with melted American cheese, caramelized onions, and tangy special spread—a perfect copycat of In-N-Out’s iconic secret menu item.
Ingredients
- For the Special Spread:
1/2 cup mayonnaise
2 tablespoons ketchup
2 tablespoons sweet pickle relish
1 teaspoon white vinegar
1/2 teaspoon sugar
Pinch of salt
- For the Fries:
2 pounds russet potatoes (or 1 bag frozen fries)
Vegetable oil for frying
Salt to taste
- For the Toppings:
8 slices American cheese
2 large yellow onions, thinly sliced
2 tablespoons butter or oil
Directions
- Make the spread: Whisk together mayo, ketchup, relish, vinegar, sugar, and salt in a small bowl. Refrigerate until ready to use.
- Caramelize the onions: Heat butter in a large skillet over medium-low heat. Add sliced onions and cook for 15-20 minutes, stirring occasionally, until deep golden brown and sweet. Season with salt.
- Prepare the fries: If making fresh fries, cut potatoes into 1/4-inch strips and soak in cold water for 30 minutes. Dry thoroughly. Heat oil to 325°F and fry for 3-4 minutes. Remove and let rest 5 minutes. Increase oil temperature to 375°F and fry again for 2-3 minutes until golden and crispy. If using frozen fries, bake according to package directions until extra crispy.
- Assemble: Place hot fries on a serving plate. Immediately top with torn American cheese slices. Add warm caramelized onions.
- Finish: Drizzle generously with the special spread. Serve immediately while hot.
Notes
- Tips:
The double-fry method is essential for crispy homemade fries
Don’t skip soaking the potatoes—it removes excess starch
Make the spread ahead for better flavor development
Use American cheese for authentic melt quality - Swaps:
Use frozen crinkle-cut fries for convenience
Try sharp cheddar if you prefer, though it won’t melt the same
Add diced pickles on top for extra tang
Make it spicy with a dash of hot sauce in the spread
| Nutrient | Per Serving |
|---|---|
| Calories | 615 kcal |
| Total Fat | 38 g |
| Sugars | 7 g |
| Protein | 16 g |
| Dietary Fiber | 4 g |
Caramelizing the Onions
Slice your onions thin and cook them low and slow in a bit of oil or butter. This process takes about 15-20 minutes but it’s worth the wait.
Stir occasionally and let them develop that deep golden-brown color and sweet flavor. Don’t rush this step—properly caramelized onions make all the difference.
Season with a pinch of salt to help draw out moisture and enhance sweetness.
Preparing Perfect Fries
For homemade fries, cut russet potatoes into 1/4-inch strips and soak in cold water for 30 minutes to remove excess starch. This creates crispier fries.
Fry at 325°F for 3-4 minutes, let them rest, then fry again at 375°F until golden and crispy. The double-fry method gives you that perfect crispy exterior.
If using frozen fries, bake according to package directions until extra crispy—they need to hold up under all those toppings.
Frequently Asked Questions
Can I make these in an air fryer?
Yes! Air fry frozen or fresh fries at 400°F for 15-20 minutes, shaking halfway through. They’ll be crispy and ready for toppings. Just make sure they’re extra crispy before adding the cheese and toppings so they don’t get soggy.
What’s the best cheese to use for Animal Style Fries?
American cheese is essential for authentic results because it melts smoothly and evenly over the fries. Pre-sliced deli American or Kraft Singles both work perfectly. Other cheeses, like cheddar, won’t give you that signature creamy melt.
Can I make the special spread ahead of time?
Absolutely! The spread actually tastes better when made 2-4 hours ahead or even the night before. Store it in an airtight container in the refrigerator for up to one week. The flavors blend together beautifully as it sits.
