The present invention relates to the use of carbon monoxide as a process aid to ameliorate the loss of red color of fat-beef-trimmings while they are heat treated to produce finely textured beef. Finely textured beef, sometimes known as fat reduced beef, is produced from trimmings. The finely textured beef may be exposed to an elevated level of carbon monoxide before, during, or after the finely textured beef is heated to improve the final color of the finely textured beef product.
