Preheat oven to 350°F
Grease your loaf pans. *I Grease my cast iron loaf pans with butter. You can also use parchment if you'd like. Also, see NOTE 2 about pan sizes.
Combine flour, baking powder, baking soda, cinnamon, pumpkin pie spice, and salt. Whisk until combined.
In a large mixing bowl add pumpkin, eggs, sugar, brown sugar, melted butter, evaporated milk and vanilla extract. Mix until combined.
Add your dry ingredients to the wet ingredients and mix until combined. Be careful to not overmix.
If you are adding the cinnamon sugar topping go ahead and mix the cinnamon and sugar.
Split batter between your 2 greased loaf pans. (If using cinnamon sugar topping sprinkle it on the tops of your batter.)Bake in pre-heated oven for approximately 45 minutes or until a wooden toothpick inserted near the center comes out clean. *Ovens and pans will vary, so watch yours for golden edges and check the center with a toothpick. Cool in the pan on a wire rack for about 10 minutes. Carefully remove from the pan and let cool completely on a wire rack.
Slice and enjoy! *It's amazing with butter*