Cold brew usually involves extracting coffee over an extended period with cool water. That distinguishes it from coffee brewed hot and then chilled, and from cold-drip systems with a different water-delivery method. The source addresses these distinctions alongside common questions about strength and storage.
Write a recipe that includes coffee, brewing water and any dilution at serving. A concentrate can seem very different once ice, water or milk is added. Caffeine content cannot be inferred from the words cold brew alone, because the coffee and the amount consumed remain part of the calculation.
Use clean equipment and an appropriate refrigerated storage routine based on reliable food-safety guidance. Do not treat a suggested steep time as a guarantee of indefinite shelf life. When comparing batches, taste the beverage at its intended serving strength and record freshness as well as flavour. A smaller batch that is used promptly may fit a household better than a large supply prepared for convenience.
The conversation
A good question can make a better brew.