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In-N-Out Copycat Animal Style Fries: A Beginner-Friendly Guide to Perfecting a Classic

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can make them at home! 🏡🍟 Crispy golden fries smothered in melty cheese, caramelized onions, and a tangy secret sauce—the perfect indulgence! No drive-thru needed, just pure homemade deliciousness in every bite. 🍔✨ Try this easy recipe and bring the ultimate fast-food experience to your kitchen!

  • Total Time: 35 mins
  • Yield: 2-3 servings 1x

Ingredients

Scale
  • ½ cup mayonnaise
  • 2 tablespoons ketchup
  • ½ tablespoon rice vinegar or white vinegar
  • 2 tablespoons sweet relish
  • 1 tablespoon sugar
  • ½ tablespoon chili flakes (optional, for extra heat)

Main Ingredients

The core of the dish is simple, but each ingredient plays a crucial role in achieving the perfect balance of flavors.

  • ½ bag frozen fries (or fresh-cut fries if preferred)
  • 2 slices American cheese or ½ cup shredded cheddar cheese
  • 2 onions, diced
  • 2 tablespoons butter
  • 1 tablespoon neutral oil (such as vegetable or canola oil)
  • ½ teaspoon salt

Instructions

1. Caramelizing the Onions

Caramelized onions add a deep, rich sweetness that balances the saltiness of the fries and cheese.

  1. Melt the butter in a pan over medium-low heat and add the neutral oil.
  2. Add the diced onions and salt to the pan, stirring to coat them in the butter mixture.
  3. Cook the onions slowly, stirring every few minutes to ensure even caramelization. This process will take at least 30 minutes but is essential for achieving the right flavor.
  4. If the onions start to brown too quickly, reduce the heat slightly and continue cooking until they become soft and golden brown.
  5. Once done, remove from heat and set aside.

2. Preparing the Special Sauce

While the onions are cooking, prepare the signature sauce to save time.

  1. In a small bowl, mix together the mayonnaise, ketchup, vinegar, sweet relish, sugar, and optional chili flakes.
  2. Stir until smooth and well combined.
  3. Set aside in the refrigerator to let the flavors meld while preparing the other ingredients.

3. Cooking the Fries

For convenience, frozen fries work perfectly in this recipe, but fresh-cut fries can be used as well.

  1. Cook the frozen fries according to the package instructions, either by baking or frying. If using fresh-cut fries, soak them in cold water for 30 minutes, drain, pat dry, and fry in hot oil until golden brown.
  2. Once cooked, transfer the fries to a baking sheet lined with parchment paper.

4. Adding the Cheese

Melted cheese is a key element of Animal Style Fries, creating a creamy, gooey layer that enhances every bite.

  1. Place slices of American cheese or sprinkle shredded cheddar cheese evenly over the fries.
  2. Preheat the oven’s broiler and place the fries under the broiler for 3-5 minutes, or until the cheese is fully melted and bubbly.
  3. Remove from the oven and prepare for assembly.

5. Assembling the Animal Style Fries

Now that all the components are ready, it is time to put everything together.

  1. Sprinkle the caramelized onions evenly over the melted cheese.
  2. Drizzle the prepared special sauce generously over the top.
  3. If adding protein, layer the grilled chicken or crumbled beef over the fries.
  4. Serve immediately while the cheese is warm and gooey.

Notes

  • Caramelizing Onions Takes Time: Rushing this step can result in bitter, burnt onions. Low and slow cooking is the key to achieving soft, sweet caramelized onions.
  • Don’t Overcrowd the Fries: If baking, spread them in a single layer for even crisping. Overcrowding leads to soggy fries.
  • Customize the Sauce: The special sauce can be adjusted to taste. If you prefer a tangier flavor, add a bit more vinegar. For extra sweetness, increase the relish.
  • Protein Options: While grilled chicken and ground beef work well, shredded beef or seasoned turkey are also great alternatives.
  • Use Fresh Cheese When Possible: Pre-packaged shredded cheese contains anti-caking agents that prevent smooth melting. Freshly grated cheese melts better and creates a creamier texture.
  • Author: Paula Susan
  • Prep Time: 5 mins
  • Cook Time: 30 mins