Fill a rocks glass halfway with ice (chill the glass first if you can).
Pour in the vodka, then add the coffee liqueur.
Stir gently for about 10 seconds to chill without over‑diluting.
Optional: add a dash of orange bitters. Serve immediately.
Notes
Adjust the ratio to taste—more vodka for a drier drink, more liqueur for sweetness. For a lighter, fizzy riff, add a splash of cola or soda. Use large, clear ice to keep it cold and reduce dilution.