Preheat the oven to 175 degrees Celcius.
Line a 18*12 cm baking sheet (or similar).
Shred and squeeze out as much excess water as possible from the zucchini.
Add egg, stevia granulated sugar, stevia vanilla drops and coconut oil to a blender and mix until lightly beaten.
Add apple sauce, plain yogurt and milk and mix until smooth.
Combine oat flour, rice flour, baking soda, baking powder cacao power in a bowl.
Add the dry ingredients to the wet and mix just until combined.
Fold in the zucchini.
Pour the batter into the baking sheet and bake for 17-20 minutes depending on how sticky you prefer your cake.
Take out of the oven and let it cool for a while before slicing.