1-First, preheat your oven to 350°F (175°C) and prepare your 9×13-inch pan by greasing and lining it with parchment paper.

2-In a large bowl, whisk together the dry ingredients: flour, baking powder, baking soda, salt, cinnamon, and pumpkin pie spice to ensure they’re evenly mixed.

3-Next, in another bowl, combine the wet ingredients by beating the oil, eggs, brown sugar, granulated sugar, pumpkin puree, and vanilla extract until smooth.

4-Slowly add the dry mix to the wet one, stirring just until combined to avoid a tough cake.

5-Pour the batter into the pan and bake for 45-50 minutes, checking with a toothpick for doneness.

6-Once baked, let it cool completely before adding the frosting, which you make by blending softened cream cheese, butter, sugar, vanilla, and salt until creamy.