Preheat oven to 350 degrees F (175 degrees C). Grease and flour two 9x5 inch loaf pans.
In a medium bowl, whisk together the flour, baking soda, baking powder, salt, cinnamon, nutmeg, cloves, and ginger.
In a large bowl, whisk together the oil, sugar, eggs, and pumpkin puree until smooth. Add the dry ingredients and mix until just combined.
Pour the batter into the prepared loaf pans. Sprinkle with chopped walnuts, if desired. Bake in preheated oven for 60 minutes, or until a toothpick inserted in the center comes out clean.
Cool in pans for 10 minutes, then turn out onto a wire rack to cool completely.
Interesting Facts
Pumpkin bread is a type of quick bread made with pumpkin puree.
Pumpkin bread is a popular type of bread in the United States, especially during the fall and winter holidays.
Pumpkin bread is often made with spices like cinnamon, nutmeg, cloves, and ginger.
Pumpkin bread can be made in either a loaf pan or a muffin pan.