1/2 cup ice cubes, or as desired
2 fluid ounces brewed espresso
2 fluid ounces vanilla-flavored soy milk (such as Silk®)
2 fluid ounces vodka
1 fluid ounce coffee-flavored liqueur (such as Kahlua®)
Fill a cocktail shaker with ice. Pour espresso, soy milk, vodka, and coffee-flavored liqueur over ice; cover shaker and shake. Strain drink into 2 martini glasses.