What To Order At The Costco Food Court If You're Gluten-Free - Tasting Table
Briefly

If you need to avoid gluten, there are a limited range of choices to satisfy that hunger at Costco's food court, which primarily features wheat-based items.
It's possible for nearly every item at Costco’s food court to contain trace amounts of gluten due to the open kitchen setup, indicating cross-contamination risks.
The only gluten-free item officially disclosed is the hot dog, but express caution: servers may use tongs that have touched buns.
For those with a sweet tooth, finding gluten-free snacks at Costco is simpler, as some sweet options do not contain gluten.
Read at Tasting Table
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