Starbuck black iced

Am I allowed to order plain black iced coffee from Starbucks ? Over the counter

I won’t answer that question and I’ll tell you why.
On Pesach Chametz is not batel. So even if you only have one crumb of Chametz fall into your coffee, it’s not allowed. I prefer you went to a place like Wawa or 7-Eleven where you make your own coffee, so you’re in control of what goes into your cup.