What is Grapefruit Juice?

Grapefruit juice contributes both acid and a distinctive flavonoid bitterness (naringin) that lemon and lime lack. Freshly squeezed is the best cocktail ingredient; a refrigerated not-from-concentrate carton is acceptable for pitchers. Pink cocktail mixer — sugar, dye, and a little juice — is a different product.

The Paloma (tequila, grapefruit, soda, lime, often salt) is the primary template. Grapefruit also appears in tiki-adjacent highballs and in drinks that want bitterness without a liqueur.

Bitter, floral, and sometimes modestly sweet in pink or ruby fruit. Freshly squeezed juice smells of grapefruit; from-concentrate juice often tastes of pith, metal, and cooked citrus because pasteurization and concentration degrade volatiles and can concentrate bitter peel notes.

The Paloma is everyday Mexican bar practice — tequila’s most useful long drink — rather than a mid-century American invention. North American cocktail menus treated it as a discovery decades after it was already standard in Mexico.

Grapefruit as a cocktail citrus is 20th-century; the fruit itself is a relatively recent hybrid in commercial terms compared with lemon and lime.

Build over ice with tequila or mezcal, lime, soda, and salt if you want it. If the juice is a sweetened ruby mixer, compensate with extra lime and soda or the drink will taste of soda pop.

Fresh juice oxidizes; batch the same day when possible.