The Ultimate In‑N‑Out Protein Guide: Compare, Customize, and Maximize Your Burger Gains

A standard In‑N‑Out double‑double (two 100‑gram beef patties, two slices of American cheese, lettuce, tomato, spread, and bun) clocks in at about 37 g of protein. By contrast, a McDonald’s Quarter Pounder with Cheese offers roughly 30 g, while a Burger King Whopper provides 28 g. The difference stems from In‑N‑Out’s larger patty size and the fact they use fresh, never‑frozen beef. If you add a third patty—often called a “triple‑triple” on the secret menu—you jump to 55 g, eclipsing even a typical chicken‑breast‑based sandwich from Chick‑Fil‑A.

The menu is a playground for macro‑hackers. Request an extra patty or two, and you’ll instantly add 12 g per patty. Swap the standard American cheese for two slices of Swiss or cheddar; each slice contributes an extra 2‑3 g of protein. If you’re okay with a small carb trade‑off, ask for a “protein‑packed” version: double patties, double cheese, and add a fried egg—this pushes the total to roughly 65 g. For those who can’t eat more beef, a grilled chicken breast (available at select locations) adds 28 g of lean protein with fewer saturated fats.

In‑N‑Out doesn’t list a dedicated veggie patty, but you can create a protein‑rich vegetarian burger by ordering a “Veggie‑Double” (no meat, extra cheese, lettuce, tomato, and extra spread). The two cheese slices supply about 12 g, and adding a fried egg brings it to 18 g. Some fans bring their own plant‑based patties and ask staff to grill them; the result is a custom sandwich that can match a standard beef patty’s protein if the patty is 100 g of soy or pea protein. However, official plant‑based options are not on the menu, so you’ll need to be proactive.

Most people think of fries as the default side, but In‑N‑Out offers a few smarter choices. A small side of grilled chicken (available at select locations) adds 28 g of protein with minimal carbs. Their freshly cut apple slices are low‑calorie but negligible protein, so skip them if you’re chasing macros. The classic milkshake, made with real ice cream, can surprisingly deliver 10‑12 g of protein per 12‑ounce serving—especially the chocolate flavor, which includes cocoa solids. For a low‑carb, high‑protein boost, order a side salad with added grilled chicken and a drizzle of their spread; you’ll net another 15‑20 g.

The secret menu isn’t just a novelty; it’s a protein goldmine. The “Animal Style” burger adds extra spread, pickles, and grilled onions, bumping protein by only 2 g (the toppings are low‑protein). The “Protein‑Style” swap—lettuce wrap instead of a bun—keeps protein identical but drops carbs. The “3×3” (three patties, three slices of cheese) reaches 55 g, while the “4×4” tops out at 73 g, rivaling a small steak. These items illustrate how a few simple changes can dramatically shift macro ratios without altering the core flavor profile.

Sometimes you’re on a low‑protein day or need to balance other meals. The easiest method is to order a single‑patty burger (the “single” is rarely advertised but can be requested). Pair it with a plain bun and skip cheese—this reduces protein to about 15 g. You can also ask for a “protein‑light” version: replace the beef patty with a grilled portobello mushroom, which offers only 2‑3 g of protein but retains the burger experience. Finally, request extra lettuce and tomato while omitting the spread; the extra veg adds volume without boosting protein.

In‑N‑Out publishes a PDF nutrition guide on its official website, updated annually. The file includes calories, protein, fat, carbs, and sodium for every menu item, including secret variations. If you prefer a hard copy, you can ask any employee for a printed nutrition sheet—most locations keep a few on hand for health‑conscious customers. Third‑party apps like MyFitnessPal also have user‑verified entries, but always cross‑check with the official PDF for accuracy.

American cheese, the default, delivers about 5 g of protein per two‑slice serving. Switching to Swiss adds roughly 6 g, while cheddar offers 7 g. The difference is modest, but if you’re stacking multiple cheese layers on a secret menu item, those extra grams add up. For a dairy‑free route, a slice of vegan cheese (if the location carries it) typically supplies 2‑3 g, so you’ll lose a bit of protein but gain a lower‑saturated‑fat profile.

In‑N‑Out doesn’t sell protein powders or bars, but you can enhance your meal with on‑the‑spot add‑ons. A fried egg adds about 6 g of high‑quality protein, while a slice of bacon contributes another 3 g. Some locations will grate fresh Parmesan on request, which adds 2 g per tablespoon. If you’re willing to bring your own supplement, many patrons sprinkle whey protein powder into the spread for a quick macro boost—just ask staff to mix it in before serving.

When you walk into an In‑N‑Out, ask the crew for a “nutrition pamphlet” or “protein guide.” Most managers keep a stack of the latest PDF printouts near the register. If they’re out of stock, they’ll usually email you a copy or direct you to the website. The staff are accustomed to these requests because the chain emphasizes transparency, so you’ll rarely encounter resistance.

From time to time, In‑N‑Out rolls out seasonal items like the “Spicy Burger” or a “Holiday Double‑Double.” While the core patty count stays the same, special sauces can add a few grams of protein (e.g., a mayo‑based sauce with added egg whites). Occasionally, the chain tests a “Chicken‑Only” sandwich during summer months, which swaps the beef for a grilled chicken breast, delivering 28 g of protein in a single sandwich—great for a low‑fat, high‑protein option without extra carbs.

In‑N‑Out grills its beef patties on a flat top at a consistent temperature, which seals in juices but doesn’t denature protein significantly. The cooking process may cause a minor loss of about 5 % of total protein due to moisture evaporation, but the difference is negligible—your 37 g count remains essentially accurate. If you request a well‑done patty, the protein stays the same; only the texture changes. Grilling a chicken breast versus frying it can affect fat content more than protein.