What type of bar tool is used to measure liquor accurately?

The jigger is the correct choice for measuring liquor accurately in bartending. This tool is specifically designed for precision, allowing bartenders to pour consistent amounts of alcohol, which is crucial for creating well-balanced cocktails. Jiggers typically have two measuring sides, often with one side measuring 1 ounce and the other side measuring 1.5 ounces (or a similar ratio), enabling bartenders to quickly and accurately measure different quantities of liquor depending on the recipe.

Using a jigger ensures standardization in drink preparation, which not only maintains the integrity of a cocktail recipe but also helps in controlling costs and drink strength. This level of accuracy is vital in a professional setting where consistency is key to customer satisfaction and the establishment's reputation.

While other tools like measuring cups and shot glasses can also measure liquid, they do not provide the same level of precision or convenience that a jigger offers in bartending scenarios. A bar spoon is primarily used for stirring and mixing ingredients rather than measuring them.