Garnish: lime wheel & graham cracker crumbs for rim
Instructions
Prepare a martini glass by rubbing the rim with a slice of lime or dipping it into a small flat plate of simple syrup. Dip the wet rim into the graham cracker crumbs to coat.
Add ½ cup of crushed ice to a shaker then pour in the vanilla vodka, Licor 43, key lime juice, and heavy cream. You can add a squirt or two of simple syrup here if you like your drinks a little less tart. (I don't think it's needed.) Shake well.
Pour the cooled martini into the prepared glass and, garnish with a lime wheel.
Notes
MAKE AHEADTo prepare in advance, simply stir all the ingredients together without ice in a container with a lid. You can store it in the refrigerator for up to 24 hours.