• In KitchenAid (or using an electric hand mixer) cream together butter, sugars, and pumpkin pie spice on medium-high speed, until well-combined
  1 cup (226 g) unsalted butter, 1 cup (200 g) granulated sugar sugar, ½ cup (100 g) light or dark brown sugar, 1 Tablespoon pumpkin spice
• Add pumpkin puree, egg and egg yolk, and vanilla extract and beat on low-speed until combined.
  1 large egg + 1 egg yolk, 1 teaspoon vanilla extract, ½ cup (130 g) pumpkin puree
• In separate, medium-sized bowl, whisk together flour, corn starch, baking powder, and salt.
  3 ¼ cups (405 g) all-purpose flour, 1 Tablespoon corn starch, 1 teaspoon baking powder, ¾ teaspoon table salt
• Gradually (with mixer on medium-low speed) stir the dry mixture into wet ingredients, pausing occasionally to scrape down the sides of the bowl to ensure that all ingredients are well-combined.
  
• Cover dough with plastic wrap and transfer to the refrigerator to chill for 1 hour.
• Shortly before dough has finished chilling, preheat your oven to 350F and prepare cookie sheets by lining with parchment paper.
  
• Remove dough from refrigerator and roll into 2 Tablespoon-sized (42g) balls. Dough may be a bit sticky.
• Place on cookie sheet at least 2" apart and bake on 350F for 12-13 minutes.
  
• Immediately after baking, use the (clean) bottom of a glass or measuring cup to gently flatten each cookie.
• Allow cookies to cool completely on cookie sheet before frosting.
  

Cream Cheese Frosting

• In a stand mixer fitted with a paddle attachment (or using an electric mixer and a large bowl), beat together cream cheese, butter, and brown sugar until well-combined.
  
  6 ounces (170 g) cream cheese, 6 Tablespoons (85 g) butter, 2 Tablespoons brown sugar
• Stir in vanilla extract and salt, and then scrape down sides and bottom of bowl and beat briefly once more to ensure all ingredients are well-combined.
  
  1 teaspoon vanilla extract, ¼ teaspoon salt
• Gradually, with mixer on low-speed, stir powdered sugar into frosting until completely combined (pausing occasionally to scrape down sides and bottom of bowl).
  
  3 cups (400 g) powdered sugar
• Once cookies have cooled completely, spread or pipe icing over the tops of cookies. Add a sprinkle of fresh grated nutmeg, cinnamon, or even some fun colorful sprinkles, if desired.