Coffee is brewed near boiling, but the hottest it should be served is 60 degrees C, or around 140 degrees F. Basically her temperature was the same as it was literally coming out of the machine, no one takes a big gulp of coffee the second it comes out of the machine.
McDonalds kept their coffee as hot as possible to give the illusion it was fresher than it was. By keeping the coffee at 190-200F then they believed that customers would feel that the coffee was fresher, even though they knew it was unsafe to serve coffee that hot.
Larger places follow the same rules here, while coffee is brewed extremely hot it usually rests for a bit before serving unless a customer explicitly asks for it. In restaurants it’s served for you. Even Starbucks most of their drinks are milk based which cools the coffee, except for Americanos which are just espresso and hot water, and you’ll usually see those with an insulator cup to highlight that
Found this, which explains serving coffee better than I can. https://mtpak.coffee/2022/08/takeaway-cups-coffee-temperature-ideal-serving/
https://www.caoc.org/?pg=facts
McDonald’s admitted it had known about the risk of serious burns from its scalding hot coffee for more than 10 years. The risk had repeatedly been brought to its attention through numerous other claims and suits.
