Preheat the oven to 180oc and line a 12 hole cupcake tray with paper liners – green if you have them.
Sieve the dry ingredients of flour, cocoa powder, baking powder, baking soda together into a bowl then add in both sugars.
In a separate bowl, mix together the eggs, vanilla and melted butter and whisk.
Pour the wet ingredients into the dry ingredients and add in the buttermilk and mix until combined. Do not overmix.
Using an ice cream scoop drop equal amounts into each cupcake case then place in the oven for 18-20 minutes until a toothpick comes out clean when inserted.
Leaved to cool completely on a cooling rack.