Pour the coarse-ground coffee into a cheesecloth bag. Add the bag and cold water to a large mason jar or other airtight container. Alternatively, add the coffee grounds directly to the water.
Place the container into the fridge for 12-24 hours. When ready to use, remove the cheesecloth bag or pour the coffee-grounds mixture through a cheesecloth-lined strainer. Do not squeeze the bag dry, otherwise the cold brew may taste overly bitter.
Store the cold brew concentrate in an airtight container in the fridge for 3-5 days. Alternatively, freeze leftover cold brew into ice cubes and store in the freezer for up to 2 weeks.
To make cold brew latte:
Add several ice cubes to a glass.
Pour in the milk, vanilla, and sweetener. Stir with a straw, spoon, or stirrer to combine.
Add the cold brew concentrate on top. Stir to combine and enjoy!
Notes
*If your milk is already sweetened ("original") and has vanilla flavor, omit the syrup and vanilla until you taste it. Then, sweeten to taste.
The cold brew concentrate yields 2 cups, enough for 4 (12-ounce) lattes.
Latte recipe is written for a 12-ounce latte (Starbucks "tall"). If you'd prefer 16-ounce ("grande"), type "1.33" next to servings.
The cold brew concentrate is made with a ratio of 1:4-5 coarse-ground coffee to water.
The latte is made with a ratio of 1:2 cold brew concentrate to milk. If using regular cold brew, (not concentrate), recommend a ratio of 1-2:1 cold brew to milk.