By some sort of luck, I met a bartender who also likes to experiment with the Old Fashioned and told me about adding simple syrup made with coffee. Coffee and whiskey can be a good match when done right, so of course I was naturally intrigued. That curiosity led to experimenting with different recipes for a coffee simple syrup I can enjoy at home. It consists of two steps: making the cold brew coffee and then making the simple syrup.
12 ounces cold brew coffee
3/4 cup to 1 cup brown sugar
Feel free to experiment with different sugars and different ratios, depending on your personal preference. Smaller or bigger batches are also easy to do, just keep in mind that the typical simple syrup has a 1:1 of liquid and sugar.
But First, The Cold Brewed Coffee
If you’ve yet to try making cold brew coffee, I highly recommend giving it a shot. Since I’ve already written up how to make it, you can check out my methods at Making Cold Brew Coffee.
Making the Simple Syrup
Now for the simple syrup. In a small pot, mix 12 ounces of cold brew coffee and the 3/4 to 1 cup of your sugar of choice (the amount depends on your sweetness preference). Bring to a boil and stir constantly to make sure the sugar dissolves. Once the mixture reaches a boil, simmer the syrup over low heat for 10 to 15 minutes. Take it off the heat and let cool to room temperature.
Once cooled down, pour into a container which can be sealed with a lid or other mechanism. Unless you plan on using this up right away for something like a rad cocktail party, I recommend keeping this mixture stored in the fridge. Best to typically enjoy within a couple weeks.