In a medium saucepan, stir together the sugar, salt, cornstarch and cocoa powder
Whisk in the milk...the cornstarch and cocoa powder will float on top of the milk but as you go on they'll be absorbed, so don't worry -but keep the sides of the pan scraped down
Using medium heat, bring the mixture to a low boil, stirring constantly...this step can take up to 15 minutes
Keep the mixture bubbling slowly until it thickens enough to coat the back of your stirring spoon
Remove from heat and stir in the butter and vanilla
*THE PUDDING WILL BE HOT**
Pour into a sturdy bowl and let rest for 10 minutes before covering with plastic wrap...have the wrap touch the surface of the pudding, this prevents a "skin" from forming
Refrigerate and enjoy!
