This stuff is so easy to make and tastes amazing!
In a medium-sized saucepan, stir together the cocoa powder and sugar until well blended.
Add the water, salt, and vanilla. Bring to a boil over medium heat, whisking constantly.
Continue boiling and stirring until mixture thickens, usually about 3 – 4 minutes. The mixture will be fairly thin (it will thicken to a syrup-like consistency once cooled).
Remove from heat and cool. Store the syrup in an airtight glass container in the refrigerator. When refrigerated it will keep for at least a month. Enjoy!