Step 1: Preheat your oven to 350°F (175°C). Grease a 9×5 inch loaf pan and line it with parchment paper for easy removal.
Step 2: In a medium bowl, whisk together the flour, baking soda, baking powder, salt, cinnamon, nutmeg, and cloves. Set aside.
Step 3: In a large bowl, combine the melted butter, oil, granulated sugar, brown sugar, and maple syrup. Whisk until smooth.
Step 4: Add the eggs one at a time, whisking well after each addition. Stir in the pumpkin puree and vanilla extract.
Step 5: Gradually add the dry ingredients to the wet ingredients. Use a spatula to fold the mixture together until just combined. Do not overmix.
Step 6: Pour the batter into the prepared loaf pan and smooth the top with a spatula.
Step 7: Bake for 55 to 65 minutes, or until a toothpick inserted into the center comes out clean or with just a few moist crumbs.
Step 8: Allow the loaf to cool in the pan for 15 minutes before transferring to a wire rack to cool completely.
Step 9: Prepare the glaze by whisking together the powdered sugar, maple syrup, melted butter, and vanilla until smooth. Drizzle over the cooled loaf and let it set for 10 minutes before slicing.