McCormick Gluten Free, Non GMO Rum Extract With Other Natural Flavors, Enjoy the true flavor of rum with McCormick Rum Extract With Other Natural Flavors. It's a key ingredient in making homemade eggnog, lattes and mocktails without any artificial flavors, or corn syrup. Non GMO and gluten-free. Here at McCormick, we're always working to craft the best flavors for you and your family. That's why you won't find any artificial flavors in this extract. Rum Extract will not add color to your recipes. Tip Try using a dash of food coloring to achieve desired hues.