What oil does In-N-Out fry in?
In-N-Out cooks with Fries cooked in 100% sunflower oil (regular, not high-oleic — high PUFA); burgers griddled, but the signature spread is soybean-oil based..
BMedium Risk — 5.3g avg PUFA/item across 48 items
The 5 cleanest things to order at In-N-Out
| Diet Coke | 0.0g PUFA |
| Pink Lemonade | 0.0g PUFA |
| Hot Cocoa | 0.0g PUFA |
| Iced Tea | 0.0g PUFA |
| Coca-Cola | 0.0g PUFA |
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 report card, or where it lands on the Seed Oil Index.