quarter cup tonic water
Tonic water contains minimal nutritional value beyond water and carbonation; commercial varieties typically provide only trace amounts of quinine and minimal calories if unsweetened, though standard versions contain 10-15g of sugar per 100ml depending on sweetening method.
About
Tonic water is a carbonated soft drink originating in 19th-century British colonial India, formulated as a medicinal delivery system for quinine, an antimalarial compound derived from the cinchona tree bark. Modern tonic water is a carbonated beverage flavored with quinine (typically 15–100 mg per liter in contemporary formulations), citrus botanicals, and other aromatics, sweetened with sugar or artificial sweeteners.
The liquid is characterized by its clear to pale golden appearance, distinctive bitter-quinine taste balanced with citrus notes, and pronounced carbonation. Commercial tonic waters vary significantly in quinine content and sweetening methods, from traditional full-strength versions to diet and premium craft variants that emphasize botanical complexity over medicinal bitterness.
Culinary Uses
Tonic water functions primarily as a mixer in cocktails, most famously paired with gin to create the gin and tonic. Its bitter quinine profile and carbonation complement spirituous drinks while providing refreshment and palatal complexity. Beyond mixed drinks, tonic water serves as a cooking ingredient in small quantities—a quarter cup might be used to deglaze pans, brighten glazes for poultry or seafood, or add subtle bitterness and carbonation to marinades and sauces. The citrus and botanical notes integrate well with seafood preparations, game meats, and light desserts. In some molecular gastronomy applications, tonic water's carbonation is leveraged for texture and mouthfeel.