Martha White® Yellow Corn Muffin Mix. Just add water or milk! Since 1899, Martha White has been a trusted name in Southern kitchens, providing folks with the highest quality products. Making Family Traditions Easy™! Questions or comments 1-800-663-6317 weekdays 9am - 7pm (EST). Package information will be helpful when contacting us. For the best recipes and baking tips visit us at: www.marthawhite.com. Made with 35% recycled fiber. Crisco is a registered trademark of The J.M. Smucker Company.