So yesterday, Sunday, we were insanely busy per usual. At one point out dt line wrapped the store twice and cafe line was out the door. One lady had a 6 drink order, one of which was iced coffee. At the hand off she asked me to just put 8 pumps classic and she'd do cream on her own. By the time I got to her drink i realized we had no iced coffee so i politely told her it would be a few more minutes. Iced coffee comes, 8 pumps classic, pour it and hand it off and she said wheres my cream, um sorry I thought you said you wanted to do it yourself. So I go to add cream and stir it and she scream AH AH AH like I'm a dog, says it won't taste the same and I need to remake it. Mind you theres probably 35-40 people in the store it was insane. She proceeds to engage another customer and tell him how stupid I am! I turned to her and said maam theres absolutely no reason for you to call me stupid, I'll happily remake your drink but I was only making it the way you asked me to. What would yall have done? I've only been with Starbucks about 5 or 6 months so I didnt want to go too far but inside i wanted to jump across the counter and smack her. How fucking rude and ignorant.