AIBU to drink hot chocolate with marshmallows?

[Snog]

...and to offer this beverage to my adult friends?
DP says this is very childish. I thought it was perfectly normal. who is right?

Did you do a proper risk assessment to make sure they wouldn't choke, and that there were no small children in the vicinity who could steak said marshmallows and then also choke?
Because if you didn't, YABVU and we need to start a petition about you

I don't drink tea or coffee but love hot chocolate. The best hot chocolate I ever had was on the roof terrace of the Uffizi in Florence.

It's so disappointing to order a hot chocolate and discover they just use dusty old Cadbury's powder.

I'm a big fan of hot chocolate. My DD had the Christmas Starbucks Honey and Almond hot chocolate yesterday and said it was fantastic.
I had a Costa hot Choc at the weekend, (think it was caramel)with marshmallows and whipped cream.
Definitely for grown ups as well..