A black velvet is a beer cocktail made from a combination of stout (often Guinness) and white sparkling wine (often Champagne).
[3] A black velvet is made by mixing equal parts of stout and Champagne or cider without ice.
[3] A black velvet can also be made by filling a champagne flute halfway with sparkling wine and floating the chilled stout beer on top of the wine.
[5] The differing densities of the liquids cause them to remain largely in separate layers (as in a pousse-café).
[5] The effect is best achieved by pouring the stout over a spoon turned upside down over the top of the glass.