The brown mooshroom was added in snapshot 19w08a.
https://minecraft.gamepedia.com/Mooshroom
Shout out to Lalden. I used his design as the base for this one.
How to Print?
1.Click on the papercraft design image.
2.Make sure it has not been resized by your browser (you might need to click the image again).
3.Print using your browser's Print function.