What do you think the black part under the soft serve ice cream is food?

Can you guess what that black stuff is under the soft serve ice cream?
It’s coffee-flavored jelly.
Normally, coffee is a hot drink, so you have never seen or eaten coffee-flavored jelly, have you?
It seems to have originated in Japan and is only available in Japan.
The harmony of bitter jelly and sweet soft-serve ice cream is exquisite.

This is a coffee jelly from a chain called VELOCE, which is a standard menu item at Japanese coffee shops.