Whataburger vs In-N-Out vs Portillo's.

Three regional icons with fiercely loyal fan bases. Whataburger is the Texas institution; In-N-Out is California's cult classic; Portillo's is Chicago's diner-format darling. Each has a fry program that looks superficially similar to the others — potatoes, oil, salt — and each one has made entirely different decisions about what that fry actually is. When you line all three up on Frypedia's dietary metrics, only one comes out all-green. The other two land in completely different places.

Three fry programs, three philosophies.

Whataburger runs what's closest to a default fast-food fry. A medium-cut French fry, cooked in a canola-and-soybean blend, shared fryer with the chain's breaded fried sides (onion rings, jalapeño poppers, fried chicken strips). Nothing about the Whataburger fry is unusual by national-QSR standards. What's unusual is that Whataburger has kept it this conventional while the chain itself has grown into a Texas-pride cultural institution with cross-country trademark-territorial behavior (the chain actively fights non-Texas expansion into markets that might dilute the brand). The fry is not the point at Whataburger. The burger is the point. The orange-and-white color scheme is the point. The fry is a side.

In-N-Out runs, by almost any measure, the cleanest fry program on this three-way comparison. Hand-cut from whole Kennebec potatoes in-store, blanched, and fried in 100% sunflower oil in a dedicated fry fryer. The menu is small enough (burgers, fries, shakes) that the dedicated fryer is architectural — there's no wheat-breaded product on the menu to cross-contaminate. The fries are the only fry on this three-way that's celiac-safe and vegan. This is why In-N-Out is on The Cold Eight and the other two aren't.

Portillo's runs the most contradictory fry program of the three. Shoestring-cut, cooked in a vegetable-oil-and-beef-tallow blend with shared filtration across the chain's other fried items. The beef tallow addition is what makes the Portillo's fry distinctive — it adds the savory depth that Portillo's loyalists describe as "diner fries, the way they used to be." It's also what disqualifies the fry as vegetarian-safe (because beef is in the cooking medium, not just the fryer environment), and as celiac-safe (because the shared fryer cooks wheat-breaded items like Italian beef-dipped sandwiches). Portillo's fry is the best-flavor fry here and simultaneously the least-accessible.

The celiac / vegan picture is starkly different.

If you're celiac, this three-way isn't a comparison — it's a binary. In-N-Out is the only option. Whataburger's fry shares a fryer with breaded chicken strips; Portillo's fry shares a fryer with a full hot-sandwich lineup. Neither is close to celiac-safe even in an aggressive reading.

If you're vegan, the math is even tighter. In-N-Out is easily vegan-safe (plant-based ingredients, sunflower oil, dedicated fryer). Whataburger is vegan-ingredient but shared-fryer, which is a soft vegan-caution for most mainstream vegan definitions. Portillo's uses beef tallow in the cooking medium, which makes the fry not just unsafe for vegans but literally not plant-based. Portillo's fries contain beef, directly.

If you're vegetarian in a broader sense (ovo-lacto), Portillo's fries are still off the table because of the beef tallow. Whataburger's fries are fine at the ingredient level. In-N-Out's are fine universally.

Flavor and texture: entirely different products.

These three fries are not the same thing in different packages. They're three distinct products that happen to share the name "French fries."

In-N-Out's fries are the classic fresh-potato experience — soft interior, clean potato flavor, not particularly crispy by design. Regulars order them "well-done" or "animal style" (with grilled onions and cheese) because the base fry is designed as a canvas, not a finished product. Celiacs love it, but plenty of non-celiac diners find the base fry underwhelming.

Whataburger's fries are a textbook medium-quality fast-food fry. Crispier than In-N-Out, less distinctive than Portillo's, designed to absorb the chain's signature ketchup and Spicy Ketchup. They don't try to be the main event. They're a reliable companion to a bigger experience.

Portillo's fries are the flavor-forward option of the three, largely because of the beef tallow. The savory depth that tallow adds to fried potatoes is real and it's what the internet means when it says "they taste like they used to." The texture is thinner (shoestring cut), which gives a higher crunch-to-potato ratio. Many people who eat all three chains will rank Portillo's first on pure taste.

The sodium gap is the hidden story.

In-N-Out's sunflower-oil fry uses remarkably little sodium — 245 mg per medium. That's among the lowest sodium counts for any fry on Frypedia. Whataburger clocks in at 560 mg, which is right in the middle of the national-QSR range. Portillo's hits 640 mg, slightly higher, probably because the chain seasons more aggressively (the beef-tallow base flavor creates a savory signature that benefits from more salt).

For anyone watching sodium (cardiac, kidney, high-BP), In-N-Out is a staggeringly better choice than either Texas or Chicago here. It's one of the quietest wins on the Frypedia dataset.

The verdict.

If you have a dietary restriction: In-N-Out, every time. It's the only member of this three-way on the Cold Eight, and the only one a celiac or vegan can order with confidence.

If you're vegetarian: Whataburger is fine (ingredient-clean, shared-fryer caveat). Portillo's is not — the beef tallow is in the oil, not just around the equipment.

If you're chasing flavor: Portillo's wins, hands down. The beef tallow is a flavor ingredient, not a contaminant, and for people who remember pre-1990 McDonald's fries, it's a time machine.

If you're counting sodium: In-N-Out at 245 mg is the only reasonable choice. This is a genuinely large gap.

If you're hungry in Texas: Whataburger, obviously. (Though if you're in San Antonio or Austin and you can find a P. Terry's, you can get Cold Eight-grade fries in Texas. It's worth knowing.)

If you're hungry in Chicago: Portillo's is the answer, with the understanding that you're eating a fry that contains beef. The fries are part of the Italian-beef-and-diner ecosystem that defines the chain, and they're genuinely excellent if you can eat them. Just know what you're eating.

See the full writeups: Whataburger · In-N-Out · Portillo's