Preheat oven to 180 degrees C. Line 24 cupcake cups with cup cake paper.
Add the box of cake mix into a mixing bowl and stir in the chilli and cayenne. Follow the instructions on the box to make the cake mixture. Spoon the batter into the prepared cupcake papers, filling them 2/3 full.
Bake in the preheated oven until a toothpick inserted into the centre comes out clean. This wil take about 18 to 22 minutes. Remove and cool before icing.
In a bowl sift the icing sugar with the chilli, cayenne and cinnamon.
Beat in the cream cheese and butter with an electric mixer on medium speed until smooth then add the vanilla and icing sugar mixture.
Spread the icing onto the cooled cupcakes then decorate with a small dried chilli.