Preheat oven at 180°
Grease tin
Mix oil,butter and sugar and whisk untill well combined
Add milk and vanilla extract and mix till sugar dissolves
Add all purpose flour,cocoa powder,salt and baking powder and mix it till well combined
Transfer in greased mould and bake it in oven for 25 minutes at 180°
Cool it and wrap cling foil and keep in fridge for one hour
Cut in pieces and enjoy
