Coffee milk is, apparently, a Maryland drink that is well known, well loved, and has two store brands that people fight over. Being a Michigander and coffee lover I had to try this drink. So, I searched for this recipe, but since it was saved on an old laptop I can't find the original source. This is recreated from memory. It's simple enough.
Double strength coffee (I normally use 1/4 a cup ground for 4 cups water. For double strength I use a half cup of grounds)
Equal parts brewed double strength coffee and white sugar (four cups coffee, four cups sugar. You can adjust this to your own liking but this is a dessert drink so I don't fiddle around)