What is a common characteristic of beverages referred to as "cold brew"?

Beverages referred to as "cold brew" are specifically characterized by their brewing process, which involves steeping coffee grounds in cold water over an extended period, usually 12 to 24 hours. This method contrasts with traditional brewing, where hot water extracts flavors more quickly. The result is a coffee concentrate that is often smoother and less acidic than hot-brewed coffee. This unique brewing technique is what defines cold brew, making it distinct from other coffee preparation methods.

In terms of the other options, brewing with hot water is not a characteristic of cold brew, as it relies on cold water. Cold brews are not inherently carbonated, as they can be served either still or carbonated depending on preference. Finally, although many enjoy serving cold brew over ice, it is not a requirement, as it can also be consumed without ice.