By 1921, French's Mustard had adopted its trademark pennant and begun advertising to the general public.

& J. Colman of the United Kingdom, a company that produced its own mustard brand, and home care products such as Lysol, Reckitt's Blue and Brasso.

[6] In 1971 the company announced construction of a new plant in Springfield, Missouri, which would "ultimately result in the termination of manufacturing operations in Rochester."

During its heyday, French's was a sponsor of the local weather forecast, featuring its address prominently in television advertising.

They also were a prominent sponsor of the Rochester Red Wings baseball club, often in conjunction with a local brand of hot dogs, Zweigle's.

The former headquarters location at 1 Mustard Street is now home to a variety of professional offices and public agencies.

As of 2016, supermarkets stock French's mustards, its popular line of French's fried onions, Worcestershire sauce, a line of mayonnaise-based products, ketchup, barbecue sauce, potato sticks, and fried jalapeños.

[15] In 1981, a man named Rodney Moquin was convicted of defrauding a number of people, claiming he was heir to the French's Mustard fortune.