Preheat oven to 170C and line a loaf tin with baking paper.
In a bowl whisk together rice brown oil and sugar for 2-3 mins until the sugar begins to dissolve. Then whish in eggs and vanilla. Use a wooden spoon to carefully fold in sifted plain flour, baking powder bicarb, cacao a little a time alternating with milk.
The finally fold in grated zucchini and ¾ of the chocolate chips.
Pour into the prepared loaf tin and top with remaining chocolate chips. Bake the loaf for 45-50min until a skewer inserted in the middle comes out clean.