Step 2: Snag a large Mason jar (or really, any big, preferably glass container with a lid). You want about a 1:8 coffee-to-water ratio. Put your ground at the bottom of the container, and pour your water in. Cold water!
Step 3: Stir your concoction…. gently.
Step 4: Cover, then place inside your fridge for 12-24 hours. You don't have to put it in your fridge, but if you have one, you might as well.
Step 5: When it tastes like something you'd want to drink (not too strong, not too weak, Goldilocks stuff) strain it through a sieve, cheesecloth, or even a coffee filter to remove bigger clumps of grounds. Do this several times, till there's no dusty residue on the bottom of your brew.
Step 6: Serve! Add some milk. Drop in a dollop or two of sugar. Pour over ice. You just made cold brew, kid!