Preheat oven to 180 degrees Celsius (160 degrees if fan forced). Grease a bundt cake pan and set aside.
In a large bowl, place all the wet ingredients including the mashed avocado and mix well. Add the sugar and combine throughly.
In a separate bowl, sift all the remaining dry ingredients (except the chocolate chips) together.
Add the dry ingredients into the wet avocado mixture and whisk by hand, making sure that it is thoroughly mixed through. Add the chocolate chips and stir through.
Pour the batter into the prepared bundt cake pan and bake for about 45-50 mins (or until skewer/toothpick comes out clean).
Once cooked, remove from oven and let cool in the pan for another 15 minutes before cooling on a cake rack.