Preheat oven to 350° F. Line with parchment paper or spray it with a non-stick spray.
In a large bowl, mix the flour, spices, baking soda, and salt. Set the dry ingredients aside.
1 cup flour, 1 tsp pumpkin pie spice, ½ tsp cinnamon, ½ tsp baking soda, ¼ tsp salt
In a separate bowl using a stand mixer, cream together the butter, brown sugar, and granulated sugar.
½ cup unsalted butter, softened, ½ cup brown sugar, ¼ cup granulated sugar
Add the pumpkin puree, egg yolk, and vanilla extract to the wet mixture.
1 egg yolk, ⅓ cup pumpkin puree, 1 tsp vanilla extract
Stir the flour mixture into the bowl with the wet ingredients. Scrape down the sides when needed and continue until it is completely blended.
Fold the oats into the dough until well it’s combined.
1 ½ cups old fashioned oats
Scoop out a heaping tablespoons worth of dough and place on a parchment-lined cookie sheet. You can use two spoons or a medium cookie scoop to do this.
Bake in the oven for 12-14 minutes or until edges are just slightly golden brown.
Place on the cooling rack for about 5-10 minutes and enjoy!