Gluten-Free Dry Onion Soup Mix in Gluten-Free Foods, Products, Shopping & Medications Posted January 6, 2010 · Report to Admin Isn't Lipton dry onion soup gluten-free? It's past 4pm Eastern so I can't call. I also can't find the ingredients online. Here's a recipe for dry onion soup mix I found on Recipezaar. http://www.recipezaar.com/Dry-Onion-Soup-Mix-266762 Homemade Dry Onion Soup mix Ingredients 7 ounces beef bouillon powder 1/2 teaspoon black pepper 1 cup dried onion flakes 1/2 cup onion powder 1/4 cup dried parsley 1/8 cup onion salt Directions 1Mix all together and store in container. 21/4 cup of this = 1 envelope.