If you're partial to a Grasshopper, Créme de Menthe should always be in your back bar. Giffard's Créme de Menthe is a vivid, minty liqueur that packs quite a peppermint punch. Speaking of, a peppermint punch sounds pretty good right about now...

My wife still thinks that this is fantastic
Trip down memory lane, had creme de Menthe first in the 70s! It is still as good. Amazing delivery service.
Could not be better.