Preheat the oven to 350°F. Spray three 8-inch cake pans with baking nonstick spray.
In a medium bowl, sift the flour. Add the baking powder, baking soda, salt, cinnamon, ginger, pumpkin pie spice, and nutmeg. Set aside.
3 1/2 cups All-purpose flour, 2 tsp Baking powder, 1 tsp Baking soda, 1 tsp Salt, 2 tsp Ground cinnamon, 1 1/2 tsp Ground ginger, 1 tsp Pumpkin pie spice, 1/4 tsp Ground nutmeg
In a large bowl, mix the oil, brown sugar, sugar, vanilla, sour cream, eggs, and buttermilk.
1 cup Oil, 1 1/4 cup Brown sugar, 1/4 cup White granulated sugar, 1 tsp Pure vanilla extract, 4 Large eggs, 1/2 cup Sour cream
Add in the dry ingredients and mix until just combined.
1 cup Buttermilk
Pour the cake batter evenly into the three cake pans. Bake for 20-24 minutes until a toothpick comes out clean.
Let the cakes sit in the hot pan for 10 minutes. Transfer the cake to a cooling rack. Cool completely.