In a measuring jug, combine the cocoa powder, granulated sugar, and cinnamon powder. Add hot water and mix well until smooth and the cocoa powder, granulated sugar, and cinnamon are well dissolved in the mixture.
Add the vanilla soy milk and Baileys into the chocolate mixture and mix well. Refrigerate for 15-30 minutes.
Fill up two cups with ice and pour the chocolate drink into each cup evenly. Top with whipped cream and more cocoa powder.