So, we made up some of these for a local event. Then other people wanted one too, so I've listed them here.
The t-shirt is Gildan heavy cotton, 5.3 oz preshrunk, 100% cotton, short sleeved, in Garnet.
The wording "Come to the Darkside, We have Cookies" is in white on the center upper chest, with a flourish in the upper corner.
I'm listing this with several sizes so check the options available. The picture shows a 2X on a man who's 6'2" and 225.