The Ultimate Guide To In-N-Out's Roadkill Fries: Ingredients, Calories, And How To Order In 2025

The "Roadkill Fries" are arguably the wildest and most infamous item on the legendary In-N-Out secret menu, a concoction that has reached near-mythical status among fast-food enthusiasts. As of December 18, 2025, this unofficial menu hack remains a high-calorie, high-flavor marvel, combining two of the chain's most popular hidden items into one massive, savory side dish.

This deep dive will break down exactly what Roadkill Fries are, provide the step-by-step instructions for ordering them without confusing your cashier, and reveal the surprisingly simple ingredients that make this fan-favorite so popular—while also looking at the hefty nutritional impact of this meaty fry mashup.

What Exactly Are In-N-Out Roadkill Fries?

Roadkill Fries are not an official menu item recognized by In-N-Out corporate, but rather a customer-created "menu hack" that has circulated through word-of-mouth and social media for years. The name itself is a fan invention, likely a nod to the messy, meat-and-cheese-laden appearance of the final product.

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The dish is a culinary combination of two other well-known In-N-Out secret menu entities:

• Animal Style Fries: The base layer of the dish. This consists of the restaurant’s fresh, hand-cut potatoes topped with a slice of melted American cheese, a generous ladle of their signature Animal Style Spread, and a pile of grilled onions.
• Flying Dutchman: The protein component. This is a simple, keto-friendly burger hack of two beef patties and two slices of cheese, served without a bun or vegetables. For Roadkill Fries, the Flying Dutchman is crumbled up and scattered over the Animal Style Fries.

In essence, you are ordering a plate of Animal Style Fries that has been upgraded with a full, chopped-up double-patty burger on top. This makes it one of the most substantial and protein-heavy side items available at any fast-food chain.

The Roadkill Fries Ingredient Breakdown (The Entities)

To achieve the ultimate topical authority, it's important to understand the individual components that make up this legendary dish. The flavor profile is a complex mix of savory, tangy, and rich elements.

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• Hand-Cut Potatoes: The foundation. In-N-Out is famous for cutting fresh potatoes in-store every day, ensuring a crisp exterior and soft interior.
• American Cheese: A single slice melted over the hot fries.
• Grilled Onions: Finely chopped white onions grilled in burger grease until caramelized and sweet.
• Animal Style Spread: The secret sauce. While the exact recipe is proprietary, copycat recipes suggest it is a blend of mayonnaise, ketchup, sweet pickle relish, a touch of white vinegar, and sugar. This tangy, Thousand Island-like sauce is crucial to the Animal Style flavor.
• 100% Beef Patties: Two fresh, never-frozen beef patties, which are typically mustard grilled before being crumbled on top.

How to Order Roadkill Fries Like a Pro in 2025

Because "Roadkill Fries" is an unofficial, fan-created term, using the name alone can sometimes result in a confused look from a new or unfamiliar associate. The key to a successful order is to use the correct terminology for the individual components.

Follow these steps for a guaranteed Roadkill Fries experience:

1. Start with the Base: Place your order by asking for a regular order of "Animal Style Fries." This tells the associate to top your fresh fries with cheese, spread, and grilled onions.
2. Add the Protein: Immediately after, ask for a "Flying Dutchman" to be added to the order.
3. Specify the Assembly: The most crucial step. Clearly request that the two beef patties from the Flying Dutchman be "chopped" or "crumbled" and then placed "on top" of the Animal Style Fries.
4. Optional: Add Mustard: For an extra layer of flavor, you can request the beef patties be "Mustard Grilled" before being chopped. This adds a tangy depth to the meat.

By breaking down the order into its official components—Animal Style Fries and a chopped Flying Dutchman—you ensure the kitchen staff knows exactly how to prepare your dish, even if they don't recognize the catchy "Roadkill Fries" moniker.

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The Unofficial Roadkill Fries Nutritional Reality

It should come as no surprise that combining a generous portion of fries, two slices of American cheese, a creamy sauce, and two beef patties results in a high-calorie, high-fat meal. This is a dish for indulgence, not for a light snack.

For context, a standard order of In-N-Out's plain French Fries contains approximately 360–370 calories.

Roadkill Fries (Estimated Nutritional Value)

The exact nutritional information is not officially published, but based on the components (Animal Style Fries plus a Flying Dutchman patty/cheese combo), the estimates are substantial:

• Estimated Calories: Approximately 890+ calories.
• Estimated Fat: Very high, with around 50-60 grams of total fat, including a significant amount of saturated fat (17–18.5g).
• Estimated Protein: High, due to the addition of the two beef patties, often exceeding 30 grams.

For comparison, a standard Animal Style Fries order is already estimated to be in the range of 750–890 calories, so the Roadkill version pushes the boundaries even further. Due to the high-fat and high-calorie nature, this item is best enjoyed as an occasional treat rather than a regular part of your diet.

Other Must-Try In-N-Out Secret Menu Hacks

The Roadkill Fries are just one example of the creativity that exists within the In-N-Out fan community. If you've mastered the Roadkill order, here are a few other essential secret menu items to try:

• The Flying Dutchman: The protein component of the Roadkill Fries, served by itself. It's simply two slices of American cheese melted between two beef patties. It is a popular option for those on a low-carb or keto diet.
• Grilled Cheese: A simple, vegetarian-friendly option consisting of two slices of American cheese, lettuce, tomato, spread, and grilled onions on a toasted bun.
• Fries Well Done: A simple but impactful hack. Requesting your fries "well done" means they are cooked longer, resulting in an extra-crispy, golden-brown texture that many fans prefer over the standard preparation.
• The 3x3 or 4x4: While the Double-Double is on the official menu, you can order a burger with three patties and three slices of cheese (3x3) or four patties and four slices of cheese (4x4) for a truly massive meal.

Whether you're a first-time visitor or a seasoned In-N-Out veteran, the Roadkill Fries remain a quintessential fast-food experience. They represent the ultimate combination of In-N-Out's fresh ingredients and the unbridled creativity of its dedicated fanbase.