Preheat the oven to 350 degree. Spray 9 x 5 loaf pan with Baking No-Stick Spray.
In a large bowl sift together the flour, baking soda and baking powder, pumpkin pie spice, and salt. Set aside
In medium bowl combine the pumpkin puree, white sugar, brown sugar, eggs, canola oil, and vanilla extract. Mix well.
Gentle fold wet ingredients into dry ingredients.
Pour mixture into loaf pan and top with pepitas (optional).
Cook for 70 minutes or until a toothpick comes out clean.
Let cool completely before slicing.