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To make the Caramelized Onions: In a large skillet or pot, melt the butter or heat the oil over medium-low heat. Add the diced yellow onions, a pinch of granulated sugar, and a pinch of salt. Cook, stirring occasionally, for 25 to 30 minutes, or until the onions are deep golden-brown and have a jammy consistency. Set aside to cool slightly.

To make the In-N-Out Secret Sauce: In a medium bowl, combine the mayonnaise, ketchup, diced dill pickles, pickle juice, granulated sugar, paprika, grated garlic, MSG (if using), and chopped chives. Add 2 tablespoons of the prepared caramelized onions. Mix until all ingredients are well combined and the sauce is smooth. Cover and chill in the refrigerator for at least 30 minutes to allow the flavors to meld.

To prepare the Fries: If using an air fryer, preheat to 375°F. If deep frying, heat vegetable oil in a large pot or deep fryer to 350°F. While the oil heats, lightly pat the frozen French fries with paper towels to remove any excess moisture. This helps them get crispier.

Carefully fry the French fries in batches, if necessary, to avoid overcrowding the pot or air fryer. Cook until they are golden brown and crispy, about 5-8 minutes for deep frying, or according to air fryer instructions. Once cooked, remove the fries and drain them on a wire rack lined with paper towels. Immediately season generously with salt.

To assemble the Animal Style Fries: Preheat your oven broiler. Arrange the hot, seasoned fries on an oven-safe serving dish or baking sheet. Top the fries evenly with the slices of American cheese.

Broil the fries for 1-2 minutes, or until the American cheese is fully melted and bubbly. Watch carefully to prevent burning.

Remove from the broiler. Spoon the remaining caramelized onions over the melted cheese. Drizzle generously with the chilled In-N-Out Secret Sauce.

Serve immediately and enjoy your homemade Animal Style Fries!


To make the Caramelized Onions: In a large skillet or pot, melt the butter or heat the oil over medium-low heat. Add the diced yellow onions, a pinch of granulated sugar, and a pinch of salt. Cook, stirring occasionally, for 25 to 30 minutes, or until the onions are deep golden-brown and have a jammy consistency. Set aside to cool slightly.

To make the In-N-Out Secret Sauce: In a medium bowl, combine the mayonnaise, ketchup, diced dill pickles, pickle juice, granulated sugar, paprika, grated garlic, MSG (if using), and chopped chives. Add 2 tablespoons of the prepared caramelized onions. Mix until all ingredients are well combined and the sauce is smooth. Cover and chill in the refrigerator for at least 30 minutes to allow the flavors to meld.

To prepare the Fries: If using an air fryer, preheat to 375°F. If deep frying, heat vegetable oil in a large pot or deep fryer to 350°F. While the oil heats, lightly pat the frozen French fries with paper towels to remove any excess moisture. This helps them get crispier.

Carefully fry the French fries in batches, if necessary, to avoid overcrowding the pot or air fryer. Cook until they are golden brown and crispy, about 5-8 minutes for deep frying, or according to air fryer instructions. Once cooked, remove the fries and drain them on a wire rack lined with paper towels. Immediately season generously with salt.

To assemble the Animal Style Fries: Preheat your oven broiler. Arrange the hot, seasoned fries on an oven-safe serving dish or baking sheet. Top the fries evenly with the slices of American cheese.

Broil the fries for 1-2 minutes, or until the American cheese is fully melted and bubbly. Watch carefully to prevent burning.

Remove from the broiler. Spoon the remaining caramelized onions over the melted cheese. Drizzle generously with the chilled In-N-Out Secret Sauce.

Serve immediately and enjoy your homemade Animal Style Fries!
