Number of serving: 6
1/2 cup unsalted
butter at room temperature
2 cups all purpose flour
1/2 cup unsweetened cocoa powder
1 tsp baking soda
1/2 tsp baking powder
1 cup (packed) light brown
sugar
4 tbsp white sugar
2 large eggs
1 cup unpeeled grated zucchini
1 large overripe banana (mashed)
1 cup bittersweet chocolate chips
Confectioner's sugar (for sprinkling on the top)- optional