Add egg and milk. Quality and value since 1930. America's favorite. Great products since 1930. Thanks for trying Jiffy! We've been making great muffin and baking mixes since the 1930's. So, when you are looking for delicious muffins, biscuits, desserts, or other great meal solutions, please think Jiffy! Howay Holmes, president Chelsea Milling Company. Partially produced with genetic engineering. www.jiffymix.com. Facebook: Find us on Facebook. Contact us at: 800-727-2460 Mon. - Fri. 8:00 am 4:30 pm EST. Packaged in recycled paperboard. Made in the USA.