While mobile kitchens haven't permeated mainstream fast food quiet yet, American chains are shifting away from the traditional restaurant format. Alongside food trucks, ghost kitchens are becoming popular because they require less space and fewer employees than traditional restaurants do.
Kitchen United, a leading ghost-kitchen company, announced on Thursday that it had closed on a $40 million Series B funding round, led by real estate company RXR Realty and GV (formerly Google Ventures).