Mustard (especially the squeeze kind) Pre-made beverage mixes
like Bloody Mary mix (check the label for barley malt flavoring or hydrolyzed wheat protein, and skip the Bloody Marys and Caesars at brunch) Store - bought soups (yup, even tomato soup can contain wheat, but especially the
creamy stuff
like Cream of Mushroom and Chicken) Sauces and salad dressings (BBQ sauce is a biggie) Brown rice syrup (often found in processed foods and alternative sweeteners, which is derived from barley) Ice cream and Fudgesicles (may contain malt extract, which is also derived from barley) Yogurt (the flavored kinds)
Gravy (usually thickened with flour) Meatballs (most often contains breadcrumbs as a binder) French Fries (ask if they've been fried in a dedicated fryer.