As a young man, he moved to Chicago, Illinois to head a wholesale cheese-delivery business after initially investing a portion of his money into it in Buffalo, New York. In 1906, he and his brother Charles began processing cheese for distribution to area retailers. They later recruited two other family members to join the firm, and in 1909 it was incorporated as J.L. Kraft Bros. & Company.
To fit with the needs of the times, the brothers pioneered together the industry's first processed cheese, something that came especially handy during World War I due to its spoil-resistant qualities. During this time, they sold major amounts of their product in bulk to the U.S. Army.
Later on, during the Great Depression, Kraft introduced what would later be its most famous products, which consisted of a container of dried pasta packaged with processed cheese packet named Kraft Dinner. After immense success, it was rebranded as Kraft Macaroni and Cheese. During this time, they became the world's second largest food and beverage company, expanding their product line with items like Miracle Whip and Parkay.
After being acquired by and merging with countless companies (including Dart Industries, Inc and Philip Morris Companies), in 2015, Kraft’s parent company merged with the H.J. Heinz Holding Corporation. Kraft Foods became a division and brand within the newly formed conglomerate, Kraft-Heinz. As of today, Kraft still shares the parent company of iconic Heinz products such as ketchup, vinegar, Lea & Perrins Worcestershire sauce, and Heinz 57 steak sauce.