I have a recipe that calls for adding a gallon of cold brewed coffee in the secondary. The comments have described how to cold brew it, but I was wondering, do I need to add the grounds plus the gallon, or just the spent grounds? I don't want to dilute the beer with an extra gallon, but would still like to get the flavor of the coffee.
Do not add the grounds. Add the liquid. And a gal. sounds like WAY too much. When I make a coffee beer, generally a cup or two of strong coffee is plenty.