What oil does Fosters Freeze fry in?
Fosters Freeze cooks with Likely soybean/vegetable oil blend for frying (unconfirmed — no allergen PDF or official disclosure found as of June 2026; consistent with standard California budget fast-food practice).
The 5 cleanest things to order at Fosters Freeze
| Soda | 0.0g PUFA |
| Soft Serve Cone (small) | 1.0g PUFA |
| Soft Serve Cone (large) | 1.0g PUFA |
| Chocolate Dipped Cone (small) | 1.0g PUFA |
| Chocolate Dipped Cone (large) | 1.0g 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 Fosters Freeze report card, or where it lands on the Seed Oil Index.