Fresh Squeezed Grapefruit Juice

Use within four hours of squeezing for best cocktail flavor. If storing, seal tightly in the refrigerator for up to 24 hours — flavor degrades noticeably after that point. Do not freeze fresh-squeezed grapefruit juice for cocktail use. Keep refrigerated.

Rolling the grapefruit firmly on the counter for thirty seconds before cutting breaks the internal juice sacs and increases yield by fifteen to twenty percent over cutting without rolling. Grapefruit juice oxidizes more slowly than lime or lemon juice and can be used up to two hours after squeezing without significant flavor loss, making it more forgiving in prep than other citrus. A small pinch of kosher salt added to fresh grapefruit juice amplifies natural sweetness and reduces perceived bitterness — this is the foundation of the Salty Dog and is worth applying even when salt is not in the recipe. Never substitute commercially pasteurized grapefruit juice in cocktails where grapefruit is a lead ingredient; pasteurization destroys the volatile aromatic compounds that distinguish the fresh fruit.

Grapefruit (Citrus paradisi) is a relatively recent citrus hybrid, believed to have originated in Barbados in the 18th century as a natural cross between the sweet orange and the pomelo — first documented as a distinct fruit by Reverend Griffith Hughes in 1750, who called it the forbidden fruit. The grapefruit entered American commerce in the 1880s when Florida growers began commercial cultivation, and by the early 20th century it had become a major US agricultural export. In cocktail culture, fresh grapefruit juice is the defining ingredient of the Paloma — Mexico's most consumed mixed drink — and is central to the Greyhound, the Salty Dog, and dozens of tiki classics including the Navy Grog. Bartenders distinguish between Ruby Red grapefruit, which has a sweeter, berry-tinged juice, and white or Marsh grapefruit, which is drier and more intensely bitter — both are used in cocktails, often seasoned with salt to amplify sweetness through contrast.

Ruby Red grapefruit produces a sweeter, more approachable juice suited to tequila and sparkling wine cocktails; white or Marsh grapefruit produces a drier, more bitter juice better suited to gin and vodka drinks where bitterness is desirable. Oro Blanco and Melogold hybrid grapefruits, available at specialty markets, produce a very sweet, low-acid, seedless juice excellent in Palomas and spritzes. For a salt-enhanced grapefruit juice concentrate for batch cocktails, stir a two-percent saline solution into freshly squeezed juice — two grams of fine salt per one hundred grams of juice — which keeps for 48 hours refrigerated and seasons every drink automatically.

No common top-eight allergens. Naturally vegan and gluten-free. Note that grapefruit juice inhibits the CYP3A4 enzyme and interacts with over eighty prescription medications including certain statins, blood pressure medications, and immunosuppressants — individuals on these medications should consult a physician before regular grapefruit consumption.