2 ounces (1/2 stick) butter, melted 2 ounces oil 2 ounces plain yogurt 1/2 cup (96 grams) granulated sugar 1/2 cup (96 grams) brown sugar 1 1/2 cups (120 grams) unsweetened cocoa powder 1 Tablespoon espresso powder 1 Tablespoon vanilla extract 8 ounces shredded zucchini (see note above) 3 large eggs 1 1/2 cups (180