First, I would just offer the pumpkin spice Frappuccino instead since that is made to be a blended drink. Maybe suggest “making it with cold brew” and use cold brew instead of frap roast. One thing I remember is that most customers have no clue what goes into drinks or which ingredients do what. They probably don’t care, I wouldn’t if I didn’t work here. Too many question are just confusing.

Anyway. I’d just throw the whole thing in the blender.

Literally throw it all in a blender. They likely just want the foam mixed in so I would ask them if that’s what they’re looking for. But I live by the simple motto of they get what they pay for no matter how dumb.

Don’t think too hard abt it just make it how it sounds good to you tbh or if you’re on dto just let bar figure it out lol