Starbucks has more caffeine. A brief look throughStarbucks caffeine amountsshows their brewed coffee drinks are much higher in caffeine. However, Starbucks has much more testing of caffeine amounts. Does McDonald’s list caffeine amounts? McDonald’s does not publish caffeine amounts, stating, ...
it first became popular in the U.S. in the 1930s. Hollywood stars on transcontinental train journeys would often stop in Chicago for a late morning meal during that time, and restaurants across the country picked up on the trend.