Place your martini glass into the fridge to chill for 30 minutes.
Finely chop ¼ cup of chocolate chips and place them on to a large paper plate. Melt ¼ cup of chocolate chips and put them into a baggie.
Swirl the inside of the martini glass with the melted chocolate. Add some melted chocolate around the rim of the glass and dip it in the crushed chocolate. If you aren't using the glasses right away, store them in the fridge.
Place a few ice cubes into a shaker. Add all ingredients, shake and pour into the prepared glasses.