‘一勺’ literally means ‘one spoon’ and functions as a measure word phrase meaning ‘a spoonful’—the amount that fits in a standard spoon. The character 一 (yī) is the numeral ‘one’, while 勺 (sháo) is a noun meaning ‘spoon’, specifically a small, shallow utensil used for scooping or serving food and liquids. Together, they form a quantified noun phrase commonly used in cooking, eating, and medicine contexts.

This phrase is neutral in register and widely used in everyday spoken and written Chinese. It typically appears after a noun it measures (e.g., 一勺糖 — ‘a spoonful of sugar’) or with verbs like 加 (jiā, ‘to add’) or 吃 (chī, ‘to eat’). Unlike some measure words, 勺 is not used with classifiers like 个; it stands alone as its own measure unit for spoon-sized quantities. It’s especially common when giving instructions, describing recipes, or dosing liquid medicines.