Have you heard of the beef tallow trend? An ingredient that was common in mid-century kitchens is now a hashtag on more than 74,000 TikTok posts, and it’s being used for more than just food.

“People are raving about these french fries,” Kennedy said after eating one, before commending other restaurants that fry with beef tallow: Popeyes, Buffalo Wild Wings, Outback Steakhous ...