Barbecue-flavored rubs and spice mixes, such as curry powder, can contain unexpected gluten for the simple reason that the products tend to sit in our cupboards for months (
if not years!) and the powders would stick together if there weren't an anti-caking agent mixed in. Since such additions are often made with gluten, Cimperman suggests
making your own mix using just the individual spices (look for ones that carry the
"certified gluten-free" logo).
