Preheat the oven to 350 degrees.
Combine the cake mix, eggs, and butter with a handheld mixer until fully combined.
Press mixture into a fully greased 9x13 baking pan.
In another bowl, beat the softened cream cheese until smooth.
Add pumpkin puree and beat again until smooth.
Add the eggs, vanilla, and butter and beat together.
Then, add in powdered sugar, cinnamon, nutmeg and mix well.
Spread the pumpkin filling mixture on top of the crust mixture in the greased baking dish.
Bake the cake for 40-45 minutes. The center should be a little doughy, even when it is done.
Allow to cool for an hour.
Serve with a dollop of whipped cream and enjoy!
