As more employees return to the office — and their daily commutes — fast-food chains are ramping up promotions and loyalty programs in a move to make fast-food breakfast a part of workers’ morning routines.   “Breakfast is the most profitable part of the day,” said Lauren Silberman, a restaurant analyst with Credit Suisse, a financial services company. McMuffins, Baconators and an array of coffee concoctions and donuts helped fuel $35 billion in fast-food breakfast sales in 2020, according to research […]