Preheat oven to 350˚F. Using cooking spray or oil, grease a bundt non-stick baking pan (like this one) .
In a large bowl, whisk together the dry ingredients: flour, sugar, baking soda, cinnamon, nutmeg, pumpkin pie spice, instant vanilla pudding and salt.
In a second medium bowl, whisk together wet ingredients: large eggs, cup oil, pumpkin, sugar, brown sugar, until well combined.
Add wet ingredients to dry ingredients and whisk until smooth. Transfer to prepared baking dish and bake at 350˚F for 35-40 mins or until a toothpick poked in the center comes out clean. Remove from the pan and let cake cool completely . Once cooled drizzle frosting on top .