Preheat your oven to 325F and prepare a 9×5 loaf pan by lining it with parchment paper.
Combine melted butter, a portion of the flour, light brown sugar, granulated sugar, and pumpkin pie spice in a bowl to create the streusel; refrigerate to firm up.
In a medium bowl, whisk together the measured flour, baking soda, cinnamon, pumpkin pie spice, and salt.
In a large bowl, cream together the sugars, pumpkin puree, and vegetable oil.
Add the eggs and vanilla extract to the pumpkin mixture, mixing until just combined.
Fold in half of the dry ingredients, followed by the milk, then finish by folding in the remaining dry ingredients.
Pour the batter into the prepared loaf pan and top evenly with the chilled streusel.
Bake for 80 minutes or until a toothpick comes out clean.
Cool completely before drizzling with the pure maple syrup glaze.