Mix the dry ingredients: Preheat the oven to 350° F. In a large bowl, combine 1 1/2 cup whole wheat flour, 1/4 cup cocoa powder, 1/2 tsp ground cinnamon, and 1 1/2 tsp baking powder. Mix well and set aside.

Melt the chocolate: In a microwave-safe bowl, add 2 oz dark chocolate chips. Wrap with cling film and microwave for 30 seconds or until melted.

Mix the wet ingredients: Add 2 tbsp olive oil, 2 eggs, 1/4 cup honey, 1 tsp vanilla extract, and 1/4 tsp salt to the melted chocolate bowl. Whisk to combine.

Combine the wet and dry ingredients: Gradually add the flour mixture into the chocolate. Mix evenly with a whisk until just combined.

Add zucchini: Fold 2 cups shredded zucchini into the batter and mix with a spatula.

Bake the brownie: Line a square cake pan with parchment paper and pour the batter in. Bake the brownies for 20 minutes.

Add more chocolate: Once the timer rings, take the pan out of the oven immediately and scatter the remaining 1 oz chocolate chips on top of the brownies while still hot. Let them cool completely before cutting into squares. Enjoy!