2 (1 ounce) squares unsweetened chocolate
2 cups white sugar
2 cups grated, drained zucchini
1 cup vegetable oil
3 large eggs
1 teaspoon vanilla extract
2 cups all-purpose flour
1 teaspoon baking soda
1 teaspoon salt
1 teaspoon ground cinnamon
¾ cup semisweet chocolate chips