Remember the irresistible aroma of McDonald’s fries in their golden age? Before 1990, these weren’t just a side; they were legendary, thanks to a secret ingredient: beef tallow. My book, “All About the Burger,” delves into burger history, but the McDonald’s fry story is too delicious to ignore.
Ray Kroc’s Obsession with the Perfect Fry
From the beginning, McDonald’s has been obsessed with the perfect fry. Co-founder Mac McDonald started with fresh-cut Idaho Russets. Still, the rich, beefy flavor imparted by their unique oil blend – 93% beef tallow and 7% vegetable oil, courtesy of Interstate Foods – made them truly iconic.
Ray Kroc, recognizing the fry’s power, was equally fanatical. He sent reps to measure potato solids, demanding spuds with 20-23% for optimal crunch. His curing process, storing potatoes to convert sugars to starch, was another key to their success.
The Simplot Partnership and the Rise of Frozen Fries
To ensure consistency nationwide, engineer Louis Martino even developed a “potato computer.” While fresh-cut fries eventually gave way to frozen in 1966, the beloved taste, thanks to “Formula 47” (named after their original meal!), remained. This was solidified through a pivotal partnership with J.R. Simplot, who revolutionized their supply chain with year-round Russet potatoes. (Fun fact: I even use Simplot fries at my burger pop-ups!)
A Side of Ketchup? Enter the Dunk Cup
Believe it or not, ketchup wasn’t always a fry companion. Early McDonald’s policy reserved it for burgers, celebrating the fries’ inherent beefy, salty goodness. But customer demand led to the ingenious “Dunk Cup,” introduced by franchisees Don and Enid Dunkleman, a pre-filled, lidded ketchup cup that became a dine-in staple.
The Day the Fries Changed Forever
Then, on July 23, 1990, everything changed. Driven by concerns over saturated fat, McDonald’s switched to a vegetable oil blend, inadvertently introducing trans fats and losing that unforgettable flavor. While today’s fries are still good, they haven’t captured the magic of the beef tallow era. The inclusion of “natural beef flavor” offers a hint of the past and, perhaps, a glimmer of hope for its return.
