Answer by
chefmark01 (81)
Yes, McCain Foods does supply some of the fries that McDonald's sells. Until the 1960's french fries were prepared onsite of each restaurant, but that changed to provide a standardized product across America. Now McDonald's processes some 2 million pounds of potatoes a day and the suppliers of frozen french fries are Lamb Weston, McCain Foods, and J.R. Simplot.