Add all of the liquid ingredients to a cocktail shaker with NO ICE.
Dry shake. This emulsifies the egg white. If not using egg white, skip this step.
Add some ice, and shake again. Strain the drink into a chilled cocktail glass, and garnish with crushed Coffee Crisp.
*Make Infused Vodka: Infuse 8 oz vodka with one crushed mini Coffee Crisp bar, stir and rest for 2 to 3 hours. Strain through coffee filter into a clean jar.