When it comes to making cold brew coffee, I really don't see the need to reinvent the wheel. I have watched many people prepare it and even though we were never big fans of cold brew, this past summer we started using it at the coffee shop. Cold brew coffee is ideal for cold espresso drinks, where you need strong flavors and boldness to blend well with the additional water, ice, flavoring or milk. Think of cold brew as a coffee "concentrate" to mix with additional liquids. Alex T., our head barista uses it at home with hot water to make himself an americano when he needs a fix. So you can use as a base for a hot coffee cup as well. We now keep a jar of cold brew in the fridge all the time. We prefer to use our Colombia Los Naranjos and Honduras coffee for cold brew.
You can watch Leesha on Youtube who does a fantastic job of explaining how to prepare cold brew. I have come to use her measurements (coffee vs water mix) with great results. Enjoy!!