Add approximately 1 cup of coffee grounds into the filter. Fill the half-gallon mason jar with approximately 4 cups of water, then slowly run the remainder of the water through the filter containing coffee grounds.
When the jar is full, sealed with a lid, gently shake it to moisten the rest of the coffee grounds, then place it into the fridge overnight to brew.
The next day, you can remove the filter containing coffee grounds, then add in the milk, and chocolate syrup. Stir or shake thoroughly until it is combined. You are then good to enjoy your delicious copycat Chick-fil-A cold brew recipe.