3/4 to 1cupsugar; lower amount makes "dark chocolate syrup"
pinchsalt
1cupboiling water
1teaspoonvanilla
Instructions
Start the water boiling. Mix cocoa, sugar, and salt in a small saucepan. Stir in enough boiling water to form a smooth paste, then stir in the remaining water.
Bring to a simmer over medium to medium-low heat, stirring often. Let simmer 2-3 minutes (I like the longer time as it makes the syrup a bit thicker), stirring occasionally.
Remove from heat and add the vanilla. Let cool.
Scrape it into a bottle or jar and store in the refrigerator 3-4 weeks (or longer?).
Notes
See comments sections for other sweetener options readers have tried.