Preheat your oven to 350 degrees F.
In a mixing bowl, combine the pumpkin cake mix, sugar, pumpkin, vegetable oil, water, eggs, cinnamon, and pumpkin pie spice. Use a hand mixer to mix until everything is well blended, which should take about one minute.
Generously spray your Bundt pan with non-stick cooking spray to prevent sticking.
Pour the batter into the prepared Bundt pan, evenly distributing it.
Bake in the preheated oven for approximately 45 minutes. Check for doneness by inserting a toothpick into the center of the cake; it should come out clean.
Once baked, remove the cake from the oven and allow it to cool in the pan for about 10 minutes.
Carefully transfer the cake to a plate or cake stand to cool for an additional 20 minutes before frosting.
For the frosting, combine the cream cheese, powdered sugar, milk, and vanilla in a bowl. Mix until smooth and creamy. If desired, add more milk to achieve a thinner consistency.
Once the cake is cool, drizzle or spread the frosting over the top, allowing it to flow down the sides.
Slice and serve your Easy Pumpkin Bundt Cake to friends and family to enjoy!