1 part vodka
1 part coffee liqueur (e.g. "Kahlua")
cream

ice cubes

cocktail glass

Put vodka, kahlua and some ice cubes in a glass and stir. Strain into a cocktail glass (the ice cubes stay in the glass you used for stiring). Now put some slightly whipped cream on top of the drink and don´t stir.

You can serve a Black Russian by not adding the cream to the drink.