Whisk dry ingredients: In a large bowl, combine the flour, pumpkin pie spice, cinnamon, baking soda, and salt.
Step 1
Cream butter and sugars: Using a mixer, beat the butter, brown sugar, and granulated sugar until creamy. Blend in the egg yolk and vanilla, then the pumpkin puree.
Step 2
Combine with dry mix: Gradually add the dry ingredients to the wet mix, then fold in the oats.
STEP 3
Chill dough: Cover the dough with plastic wrap and refrigerate for 30 minutes to firm up.
STEP 4