What oil does In-N-Out Burger fry in?
In-N-Out Burger cooks with 100% sunflower oil for fries (cut fresh in-store; switched off cottonseed oil around 2017); burgers cooked on a flat-top with minimal added oil; spread and dressings are soybean-oil based.
The 5 cleanest things to order at In-N-Out Burger
Learn this once: a salad with grilled protein and the dressing left off is nearly always the lowest seed oil order anywhere. So the list below sticks to real meals, salads included, never just a water.
| Item | PUFA |
|---|---|
| Lemon-Up | 0.0g |
| Cheeseburger Protein Style | 3.5g |
| Double-Double Protein Style | 3.5g |
| Hamburger Protein Style | 4.7g |
| 3x3 | 5.1g |
Lower PUFA is cleaner. These are estimates from published nutrition data and disclosed oils; preparation varies by location.
Why the frying oil matters
Most fast-food chains fry in seed oils like soybean, canola, corn, or a blend of them, which are high in polyunsaturated fat (PUFA). A handful still use beef tallow or other stable fats, which are far lower in PUFA. The oil a kitchen fries in is the single biggest driver of how much seed oil ends up on your plate. See the full breakdown on the In-N-Out Burger report card, or where it lands on the Seed Oil Index.
Frequently asked
Does In-N-Out Burger use beef tallow?
No. In-N-Out Burger cooks with 100% sunflower oil for fries (cut fresh in-store; switched off cottonseed oil around 2017); burgers cooked on a flat-top with minimal added oil; spread and dressings are soybean-oil based, not beef tallow. See which chains fry in real fats on Tallow Watch.