French Fries vs Onion Rings:
Which Is Gluten-Free?
Both come out of the fryer, but only one starts out gluten-free. Fries are made from potato (watch for shared fryers), while onion rings are battered in wheat flour.
French Fries is the safer celiac choice — French Fries depends on the brand or preparation, while Onion Rings contains gluten.
Verdicts last reviewed July 2026 · based on FDA gluten-free labeling rules and Celiac Disease Foundation guidance
French Fries is the safer celiac choice — French Fries depends on the brand or preparation, while Onion Rings contains gluten.
French Fries
Plain potatoes are gluten-free, but most restaurant french fries are cooked in shared fryers with breaded items, causing cross-contamination.
Watch out for:
- Cross-contamination in shared fryers
- Wheat-based coatings for crispiness
- McDonald's fries contain wheat derivatives
Onion Rings
No. Onion rings are battered or breaded in wheat flour and fried in shared oil, so they contain gluten.
Watch out for:
- Wheat-flour batter/breading
- Shared deep fryers
- Even "lightly battered" versions use wheat
Gluten-free swaps
Instead of French Fries:
Instead of Onion Rings:
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