Start by adding the coarse ground coffee to a container.
Pour in the milk, maintaining a 1 to 8 ratio, which means using 250 ml of milk.
Stir the mixture well to combine the ingredients.
Cover the container with a lid and seal it tightly.
Place the container in the fridge and let it steep for 24 hours.
After 24 hours, use a paper filter to strain the mixture and remove the coffee grounds.
