My family all think I'm crazy, but this simple combo is my go-to comfort beverage. I first discovered it at a 50's themed diner, but when I figured out how mind-numbingly easy they are to make, I started having them at home too...
1 glass ice cold Coke
1 large squirt chocolate syrup (Hershey's is my favorite, but really any brand will do)
You can pour the Coke first and then stir the syrup in with a straw, but you lose a lot of the carbonation that way. The trick is to add the syrup first, then mix in a little Coke until they are combined, and THEN fill up your glass. And that's it. World's easiest recipe. Every glass chocolatey, fizzy, and delicious :)