3 cups sugar, 1 cup vegetable oil, 3 large eggs, 1 16-ounce can solid pack pumpkin, 3 cups all purpose flour, 1 teaspoon ground cloves, 1 teaspoon ground cinnamon, 1 teaspoon ground nutmeg, 1 teaspoon baking soda, 1/2 teaspoon salt, 1/2 teaspoon baking powder, 1 cup coarsely chopped walnuts or 1/4 cup semi-sweet chocolate chips (optional)
Preheat the oven to 350°F. Butter and flour two 9 x 5 x 3 inch loaf pans. Beat sugar and oil in large bowl to blend. Mix in eggs and pumpkin. Sift flour, cloves, cinnamon, nutmeg, baking soda, salt and baking powder into another large bowl. Stir into pumpkin mixture in 2 additions. Mix in walnuts, if desired. Divide batter equally between prepared pans. Bake until the tester inserted into the center comes out clean, about 1 hour 10 minutes. Transfer to racks and cool for 10 minutes. Using a sharp knife, cut around the edge of the loaves. Turn loaves out onto racks and cool completely.