I made this to make Peppermint Patties (pa-T's?). (I built it in Maya with arbitrary scale, so you'll need to rescale it, even for peppermint patties. I scaled it in Cura to 40mm, but feel that's too small.)

Note that the top of the T does not have the bar, and is slightly thicker to make up for that. Pester me if you want a cookie cutter with an imprint bar.

(ProTips: homemade peppermint patties are super easy to make! For best results, geek out on tempering dipping chocolate (=>31% cocoa butter), which gives far far superior results.)