Cream the butter and sugar for 2 mins until light. Add the eggs, one at a time, beating until well combined. Add the vanilla extract.
In a separate bowl sift the flour, baking soda, baking powder, cocoa and cinnamon together.
Add the sifted dry ingredients and water to the cream mixture. Beat on low speed until combined.
Divide the cupcake mixture into 18 paper cases, they should only be about half full. Bake for 20 mins or until the cakes spring back when lightly pressed.
Cool the cakes in the tray for 5 mins then remove to a wire rack.
VARIATIONS: Add peppermint extract for chocolate mint flavour; Add ½ teaspoon chilli powder