Preheat oven to 350°F.
In large mixing bowl, whisk together flour, baking soda, baking powder, cinnamon, nutmeg, cloves, salt and set aside.
In another large mixing bowl, use an electric mixer to combine melted butter and sugar. Mix until color is light and the texture is fluffy. Add in eggs one at a time while mixing, then beat in pumpkin until well combined.
Pour dry ingredients into wet ingredients bowl and mix on low until combined smoothly.
Grease cake pan with nonstick cooking spray. Pour cake mix into pan and smooth the top. Make sure mix is spread evenly and place in oven for 40-45 minutes.
While cake is baking, mix together softened butter and vanilla for frosting in a large mixing bowl. Pour in powdered sugar slowly and mix on low.
Turn mixing speed up to medium and add in milk little-by-little. Mix until desired thickness. For thicker consistency, use less milk or add in more sugar.
Remove cake from oven and let cool for 15-20 minutes.
Spread frosting on cake evenly using a baking spatula, cut into squares, and sprinkle pumpkin pie spice for garnish.
Enjoy!
