• Set the oven to 350°F (175°C) to preheat. While the oven heats up, take a 9×13-inch baking pan and either mist it with baking spray or grease it well with butter.
• In a large mixing bowl, combine the spice cake mix, flour, baking powder, brown sugar, oil, eggs, and pumpkin puree. Use a whisk or a spoon to stir everything together until the batter is smooth and well mixed.
• Pour the batter into your prepared baking pan, spreading it out evenly. Bake for 35-40 minutes or until a toothpick pressed into the center of the cake comes out clean.
• Once the cake is baked, remove it from the oven and let it cool completely in the pan.

Cream Cheese Frosting

• In the bowl of an electric mixer fitted with the paddle attachment (or using a hand mixer), combine the softened cream cheese and butter. Beat on medium speed for about 2 minutes, or until they are fully combined and smooth.
• Add the vanilla extract and one cup of powdered sugar to the cream cheese mixture. Start mixing on low speed to avoid a sugar cloud, then gradually add the rest of the powdered sugar.
• Once all the sugar is in, pour in the heavy cream and increase the mixer speed to medium-high. Beat for another 2 minutes until the frosting is fluffy and smooth.
• Once your cake is completely cooled, spread the cream cheese frosting evenly over the top of the cake using a spatula or the back of a spoon. Slice, serve, and enjoy your delicious pumpkin spice cake recipe!