Dyer's Burger in Memphis Fries Patties in 100-Year-Old Oil
Dyer's Burger in Memphis fries the patties in oil that is over 100 years old - it hasn't been changed since 1912, but is periodically filtered and topped with new oil. According to legend, the "secret recipe" originated when the staff simply forgot to drain the old oil in the kitchen, but customers liked the taste so much that it was decided to make it the trademark of the establishment. After each shift, all the fat and oil is saved - there are now more than 10 buckets in reserve.