INGREDIENTS
•
3/4 cup (6 ounces, 12 tablespoons) butter
•
6 ounces (1 cup) chopped semisweet chocolate or good-quality chocolate chips that melt well (see note)
•
1/4 cup (1 ounce) natural unsweetened cocoa powder
•
1/2 cup (3.75 ounces) packed light brown sugar
•
1 cup (7.5 ounces) granulated sugar
•
1 teaspoon vanilla extract
•
1 large egg yolk
•
1 teaspoon baking soda
•
3/4 teaspoon salt
•
2 cups (about 10 ounces) finely shredded zucchini that has been wrung dry (see note)
•
1 1/4 cups (6.25 ounces) all-purpose flour
•
2 cups (12 ounces) chocolate chips or chunks