The greyhound is a simple, refreshing cocktail made with grapefruit juice and a little vodka or gin.
The vodka version is smoother, while the gin version has more complex flavors. Unlike most greyhound recipes we recommend adding a 1/2 ounce of simple syrup because it helps balance the tartness in the grapefruit juice.
The most important thing for making a good greyhound is to use the best grapefruit juice you can lay your hands on.