All-American Burger Chain Gets Saucy with Impossible Foods with Buy-One-Get-One-Free Impossible Burgers, In-Store Activations, and More LOS ANGELES, Nov. 04, 2025 (GLOBE NEWSWIRE) -- Fatburger, the iconic burger concept owned by FAT Brands Inc., is teaming up with Impossible Foods to celebrate World Vegan Month across its locations nationwide with an exclusive Buy-One-Get-One FREE Impossible® Burger promotion running all month long. To redeem, customers can order online through fatburger.com using promo cod ...