
Irish cream liqueur is an opaque cream liqueur of Irish whiskey and dairy cream, usually with chocolate and vanilla flavors. Baileys is the original.
At 15 ml it adds sweet, creamy weight and turns a drink opaque; at 25–30 ml it becomes the main flavor. It is a standard layer in shots such as the B-52 Shot. Coffee, chocolate and vanilla suit it. Keep it away from citrus and anything acidic, which curdles the cream.
Wine-based cream liqueur
Often sold as country cream, it takes the same amount but is weaker, with no whiskey flavor.
Homemade Irish cream
Blend 240 ml heavy cream with 180 ml Irish whiskey and a 400 g can of sweetened condensed milk. Add a teaspoon each of instant coffee and vanilla extract and half a teaspoon of cocoa. It works one for one everywhere except layered shots, though at about 10% it is weaker. It keeps about two weeks in the fridge.
Two years from bottling, opened or not: the cream is homogenized into a stable emulsion, and the alcohol keeps microbes from growing. Keep it cool and out of the sun; the fridge is optional. Heat or a splash of something acidic ends a bottle early, and the sign is thickening or separation that shaking does not undo.
B-53 Shot
Crème de Café liqueur, Irish cream liqueur, Sambuca