Preheat oven to 350-degrees.
In a large bowl, beat together the eggs, sugar, brown sugar, maple syrup, and oil.
In a second large bowl, whisk together the flour, baking powder, baking soda, cocoa powder, salt, and ground cloves.
Slowly add the dry ingredients to the wet ingredients and blend until just combined.
Stir in the pumpkin puree, and walnuts (if desired) until completely incorporated.
Pour the batter evenly into two loaf pans that have been liberally sprayed with baking spray.
Bake in a preheated oven for 60 - 70 minutes, or until a toothpick inserted in the center comes out clean.
Cool on a wire rack for 30 minutes. Turn the bread from the pans and cool for an additional 40 - 60 minutes.