Yesterday we had a guest who ordered passion tea, with sugar-free cinnamon dulce and heavy cream.
Sounds gross but whatever. Fellow TM makes it, and a couple minutes later the guest comes back, complaining that the cream is getting chalky. I take one look, and immediately look at the passion tea ingredients. Citric acid. I tell her that's an ingredient and that can make milk curdle.
She insists she gets it at other Starbucks and that never happens. She says the milk must be expired. I assure her we check dates of all milk daily, and our HC is good until October. I grab the container and show her, and tell her it was opened only an hour earlier when making whipped cream. "Well you must've fucked it up somehow."
I offered her a refund as she storms out and she just snaps "forget it!"
Soooo... IS there a way to make this drink ignore the rules of science?