Pre-heat your oven to 190C/170C Fan/ Gas Mark 5. Add muffin cases to the muffin tray or grease the muffin tray.
Add your flour, cocoa powder, baking powder, salt and chocolate chips and mix everything together.
Add your milk, oil, egg and sugar into another bowl and mix together.
Then add these to the dry ingredients. Mix all the ingredients together all combined and there are no lumps of flour.
Spoon the mixture into the tin/cases and bake in the oven for 35 minutes. Once baked, leave in the tray for 5 minutes then transfer to a cooling rack.