Fresh Rhubarb Shrub

Store in a sealed glass bottle in the refrigerator for up to three months. The color may deepen from pink to magenta over time — this is normal. Flavor integrates and softens after the first week. Keep refrigerated.

Use only the red or pink stalks — never the leaves, which contain toxic levels of oxalic acid and must be completely discarded. The deeper the red color of the stalks, the more vivid and appealing the final shrub; pale green rhubarb is edible but produces a less attractive, less flavorful shrub. Do not skip the resting period after adding vinegar — fresh rhubarb shrub tastes aggressively sharp and benefits enormously from one to two weeks of refrigerator resting before use. The natural high tartness of rhubarb means this shrub needs slightly less vinegar than other fruit shrubs; taste and adjust the ratio to your preference.

Rhubarb (Rheum rhabarbarum) was introduced to Western Europe from Siberia and China in the 18th century, initially prized as a medicinal plant before its tart red stalks were adopted in British cooking in the early 19th century — the first British rhubarb cultivation for culinary use is documented around the 1820s in Yorkshire, which remains the center of forced-rhubarb production. The pairing of rhubarb with vinegar is particularly effective because rhubarb's natural tartness creates a shrub with exceptional acid balance that requires far less vinegar adjustment than sweeter fruits. Rhubarb shrubs appeared in British and American culinary literature throughout the 19th century as preserved summer drinks, and the ingredient entered the craft cocktail revival as one of the most visually striking drinking vinegars — its deep pink color and assertive tartness make it immediately identifiable in cocktails.

A rhubarb-strawberry shrub — one of the most classic British flavor pairings — can be made by replacing half the rhubarb with fresh strawberries during maceration, producing a more rounded, less aggressively tart shrub excellent in gin and sparkling wine cocktails. A rhubarb-rose shrub can be made by adding two tablespoons of dried food-grade rose petals during maceration for a floral, elegant variation. For a spiced rhubarb shrub suited to autumn cocktails, add one cinnamon stick and two star anise to the sugar-rhubarb maceration.

No common top-eight allergens. Naturally vegan and gluten-free. Important safety note: rhubarb leaves are toxic due to high oxalic acid content — only the stalks are edible. Do not confuse with other plants when foraging.