You need a blizz ard arm, nose, or eye to do that. Just make the structure of a regular snow golem then right click on it with the items above
If you want a snowman on your res, I can put one on your res, if I have the build flag. Trust me, dude.
Just for clarification, that build flag only has to be there for a couple of seconds, just to put down the snowman. It can of course be removed afterwards.