Preheat oven to 180°C fan forced.
In a bowl, mix grated zucchini, ricotta, oil, eggs, brown sugar and vanilla.
Add cocoa, coffee, flour and salt directly on top. Mix until combined.
Slowly add the milk to loosen the batter slightly. You should have a thick but scoopable batter.
Spoon into a greased muffin tray.
Bake for 25 minutes or until a skewer comes out clean.
