- 1 cup grated zucchini (about 1 medium zucchini, unpeeled)
- 1/2 cup vegetable oil
- 1 cup granulated sugar
- 1 teaspoon vanilla extract
- 1 1/4 cups all-purpose flour
- 1/2 cup unsweetened cocoa powder
- 1 teaspoon baking soda
- 1/4 teaspoon salt
- 1/2 cup semi-sweet chocolate chips (plus extra for the top)