Heat oven to 170C. Sieve the flour, cocoa and baking power into a bowl, add the sugar
In a jug whisk together the eggs, milk, oil and vanilla extract until it is full of bubbles
Add liquid to dry ingredients and mix together with an electric mixer until smooth, add the chocolate chips and fudge chunks and mix until they are distributed evenly
Spoon into muffin cases and place on tray in the oven. Cook for 20-30 mins or until firm to touch and tops have split (though they don't always split). Take out of oven and leave to stand on rack for 5-10 mins and then eat warm.