In a medium pot warm the milk over medium high heat for 1 minute, then add the cocoa powder, vanilla extract and cinnamon and whisk, then add the Pure Via packets and whisk.
Bring hot cocoa to a boil (about 5 minutes) stirring intermitantly, then turn off heat when it reaches a boil. The hot cocoa will rise in the pot.
Let cool for a few minutes, then ladle into mugs, add 1 Tbs of whipped topping and sprinkle a little cinnamon on top and enjoy!