Custom green colored fountain pen ink from PenBBS, made in China. (Does not taste like matcha, it only resembles it in coloration. Please don't taste the ink.)
I scream, you scream, we all scream for matcha ice cream! Matcha is a finely ground powder made from specially processed green tea leaves that can be found in tasty beverages, sweet pastries, and of course, rich ice cream.
Read a full review of this ink from The Well-Appointed Desk.