Final answer:
The least expensive cold method for making gin liqueurs among infusion, percolation, maceration, and compounding is compounding.
Step-by-step explanation:
The least expensive cold method for making gin liqueurs among infusion, percolation, maceration, and compounding is compounding.
Compounding involves mixing distilled water with a pre-made gin base and adding flavors, such as botanicals, to create the desired taste. This method is less time-consuming and requires fewer resources compared to the other methods.
For example, with compounding, the gin can be made by simply adding distilled water to a gin concentrate and mixing it thoroughly. This process eliminates the need for complex extraction techniques and results in a cost-effective approach to producing gin liqueurs.