Now that the warm weather is here I'm being asked a lot about iced coffee and cold brew! Iced coffee is just hot brewed coffee that is allowed to chill and served over ice. Cold brew is made with cold water. Coffee grinds are steeped in cold water anything from 10 - 20hours. I usually soak mine overnight then filter with filter papers and store in the fridge. I try make it quite strong and pour it over ice! You do use more coffee. I've seen recipes from 1 cup of coarsely ground coffee to 3 of water up to 1 to 5 of water! I'd suggest start with 1 cup of coffee and 4 of water and try it. Adjust for your palate.
Some can be quite lovely black without sugar - others benefit from a little sweetness either from milk or sugar (or both). Condensed milk is fantastic especially with my dark roasted Monsoon Malabar! Cold brew has less acidity than hot brewed coffee. It also should have less bitterness. A different flavour profile entirely. Whether it has more or less caffeine I'm not quite sure! Cold brewing extracts less caffeine although steeping for several hours will extract more! If I get to the bottom of it I'll let you know!