In-N-Out spread has about 3 grams of net carbs per packet, which is low enough to fit into most keto meal plans. One packet also delivers 11 grams of fat, 6 grams of protein, and 110 calories. So in terms of pure carb count, the spread won’t kick you out of ketosis. But there’s more to the picture if you follow a stricter approach to keto.
What’s Actually in the Spread
In-N-Out’s spread is essentially a Thousand Island-style sauce. The base is soybean oil (or canola oil), mixed with cucumbers, tomatoes, vinegar, whole eggs, mustard seeds, and spices. The ingredient list also includes both sugar and corn syrup, which is why the carb count isn’t zero. At 3 to 4 grams of total carbs per serving, it’s a relatively small hit to your daily budget, especially if you’re staying under 20 to 25 grams of net carbs for the day.
That said, “clean keto” followers tend to avoid soybean oil. It’s a highly processed industrial seed oil that’s high in omega-6 fats, which can promote inflammation when they aren’t balanced by enough omega-3s from sources like salmon or flaxseed. Soybean oil is on most keto-specific “avoid” lists alongside corn and canola oil, with less processed options like olive oil, avocado oil, and coconut oil preferred instead. If your version of keto prioritizes whole, minimally processed fats, the spread doesn’t quite fit the bill, even though the macros technically work.
How It Fits a Keto In-N-Out Order
A single packet of spread on a lettuce-wrapped burger is unlikely to derail your ketosis. The real carb bombs at In-N-Out are the bun (around 39 grams of carbs for a hamburger) and the fries. Once you eliminate those, you have plenty of room for a condiment that adds 3 net carbs.
Here’s how the most popular keto orders stack up:
- Protein Style burger: Any burger wrapped in lettuce instead of a bun. Just say “Protein Style” when ordering. Adding spread here keeps total carbs manageable.
- Flying Dutchman: Two beef patties with two slices of American cheese, nothing else. It comes in at 380 calories, 28 grams of fat, 30 grams of protein, and 0 grams of carbs. This is the lowest-carb option on the menu, and adding spread would bring you to roughly 3 to 4 grams total.
If you want to keep your order as close to zero carbs as possible, swap the spread for yellow mustard. Mustard has virtually no carbs and no seed oils. You can also just ask for no spread, though you’ll lose some of that signature In-N-Out flavor.
Keep It or Skip It?
For most people following keto, the spread is fine. Three net carbs is a small fraction of a typical 20-gram daily limit, and it makes a lettuce-wrapped burger taste significantly better. If you’re ordering two burgers and loading up on extra spread packets, the carbs start to add up, so keep it to one serving.
If you’re strict about avoiding processed seed oils and added sugars on keto, skip the spread and go with mustard instead. The carb difference is minimal, but the ingredient quality is noticeably cleaner. For everyone else, enjoy the spread and save your carb budget where it actually matters: skip the bun and the fries.