Kahlúa Midnight Coffee Liqueur is one of the brand's more premium offerings, bottled at a higher 70 proof. The marketing materials position it as a shooter, designed to be served chilled and chased with an orange.
Kahlúa Coffee Liqueur is the number one selling coffee liqueur in the world. It's probably most famous for its role in the classic White Russian, as well as a number of other creamy, dessert-esque cocktails. It was first produced in Mexico in 1936, and the modern recipe was apparently reformulated in 1962. The name roughly translates to "house of the Acolhua people," an ancient Mesoamerican people and sister culture of the Aztecs.