Preheat your oven to 180C/350F. Grease a 9-inch cake pan and set aside.
In a mixing bowl, combine 1 cup plus 2 tablespoons of all-purpose flour, 2 teaspoons of baking powder, 1/2 teaspoon of salt, 1 tablespoon of pumpkin pie spice, and 1 teaspoon of cinnamon. Mix well.
Add 1 cup of sugar, 1/3 cup of oil, 3/4 cup of pumpkin puree, 2 tablespoons of maple syrup, 1 teaspoon of vanilla extract, and 1/4 cup of water to the dry ingredients. Mix until combined.
Transfer the batter to the greased cake pan, spreading it evenly.
Bake for 30 minutes, until a skewer comes out clean.
Remove from oven and let cool for 10 minutes. Then flip onto a wire rack to cool completely.
Once cooled, slice the cake lengthways into two or three layers.
Spread cream cheese frosting on each layer as you stack them.
Decorate the top and sides of the cake with more cream cheese frosting.
