1In medium bowl, beat whipping cream with electric mixer on high speed until cream begins to thicken.
2On medium speed, beat in powdered sugar and cocoa mix until blended. Add 1/4 teaspoon cinnamon and the vanilla; beat on high speed until soft peaks form.
3Spoon mousse into individual dessert dishes. Garnish with whipped cream; sprinkle with cinnamon. Refrigerate until ready to serve.