Beat cheese cheese, butter, and vanilla until well combined.
Add powdered sugar a little at a time until just combined.
Spread frosting over cake, and refrigerate until ready to enjoy.
Instructions
Preheat your oven to 350°F. Grease and flour a 9×13 inch baking dish, and set aside.
In a medium bowl, whisk together the flour, baking soda, baking powder, salt, and pumpkin pie spice. Set aside.
In a large bowl, combine the brown sugar, eggs, vegetable oil, pumpkin puree, and vanilla extract. Whisk until well blended. Add the dry ingredients to the wet ingredients and stir until just combined.
Pour the batter into the prepared baking dish. Bake in the center of the oven at 350°F for 30 to 35 minutes, or until the top is golden brown and a skewer inserted into the center comes out clean
Allow the cake to cool completely before frosting.