Cold brew uses a long contact time between coffee and unheated water, followed by filtration. The source focuses on immersion preparation in a container, rather than slow-drip equipment. The resulting drink may be ready to serve or a concentrate. Establish which you intend to make before choosing a coffee-to-water ratio, because a strong base and a finished drink are different recipes.
Record the dry coffee weight, brewing water, grind and steep conditions. Wet the grounds thoroughly and follow a repeatable method, then separate them from the beverage with an appropriate filter. Coffee absorbs some water, so the liquid recovered will not equal the water added. If you dilute the result, record that extra water or milk as part of the serving recipe instead of describing the concentrate ratio as the final strength.
Use clean hands, equipment and containers, and keep a home preparation refrigerated. University of Georgia research notes that cold brewing does not reliably remove pathogens introduced through contamination. There is no universal multiweek safety guarantee for every homemade batch, especially after additions. Brew manageable quantities and follow the equipment and local food-handling guidance. A smooth taste also does not establish a fixed acidity reduction or a medical benefit.

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