My adaptation , notes from the originator
So Ive never had Butterbeer but i think Mr Potter would like this. Give this a couple weeks, a month is better.

Can you sub something? Yeah, of course, but it just wont taste exactly the same. Dont let that stop you, click the blue wrench, make an adaptation and experiment. That is what DIY is all about.

Hope you enjoy!

EDIT: So it seems that i may have come close, a company put out a butterbeer ice cream.

http://www.yuenglingsicecream.com/flavors/butter-beer