Make the instant chocolate pudding as directed on the package, and then pour it into the molds. If you are getting creative by adding crackers or marshmallows, add them half way through the setting process to ensure that they do not shift while freezing. Set molds in freezer until completely frozen.
Once frozen, add a splash of milk to small plate, and crushed graham crackers to a second plate. Dip the shot glass into the milk to wet the rim, and then dip the shot glass in the crumbs to line the rim. Return to the freezer to set until you are ready to serve.
Before serving, add your vodka and a few roasted marshmallows to a small party stick.