Preheat the oven to 350 degrees Fahrenheit. Take 4 ounces of cream cheese and 4 ounces of unsalted butter out of the refrigerator to come to room temperature. You will use the cream cheese and unsalted butter later when making the frosting.
In a medium sized mixing bowl, add the flour, baking powder, and cinnamon and stir to combine. Set this aside.
In a stand mixer, cream together the sugars and cubed salted butter with the paddle attachment.
Mix in the egg and vanilla extract until just combined.
Slowly add in the flour, baking powder, and cinnamon mixture.
Once the cookie dough forms a ball, roll it out onto parchment paper or a floured surface to 3/8" thick. Cut out mini ghost shapes and bake on a lined baking sheet for 7-10 minutes.