Preheat oven to 180°C fan forced.
Add zucchini, yoghurt, oil, eggs, brown sugar, vanilla and espresso to a bowl. Mix well.
Add plain flour, cocoa powder, baking powder and salt. Mix until combined.
Fold through chocolate chips.
Pour into a lined 11x6 inch loaf tin and top with extra chocolate chips.
Bake for 45 mins or until a skewer comes out clean.
Slice and enjoy
