Melt 100 g of butter in a microwave-safe pie dish (or in the oven if the dish isn't microwave proof)
Add 250 g of castor sugar to the melted butter and stir well
Crack in 2 eggs and beat together
Add a dash of vanilla
Add 25 g of cocoa powder
Add 100 g of plain flour and mix until combined
Pour batter into the pie dish
Bake in a 180°C oven for about 25 minutes until cooked through
