Preheat and Prepare: Preheat your oven to 350°F. Line a baking sheet with parchment paper.
Mix the Wet Ingredients: In a medium-sized mixing bowl, combine the melted butter, white sugar, and brown sugar. Add the pumpkin puree, egg yolk, and vanilla extract. Mix until well combined.
Incorporate the Dry Ingredients: Stir in the flour, baking soda, salt, cinnamon, and pumpkin pie spice until the mixture forms a smooth cookie dough.
Add Mix-ins: Fold in the quick oats and about 1/2 cup of the white chocolate chips.
Form Cookie Dough Balls: Use a 2-tablespoon cookie scoop or a spoon to create cookie dough balls. Place them about 2 inches apart on the prepared baking sheet.
Baking: Bake the cookies for 15 minutes or until the edges begin to brown.
Top with Chocolate Chips: Remove the cookies from the oven and press extra white chocolate chips on top while they're still warm.
Cool and Enjoy: Let the cookies cool on the baking sheet for 8 minutes, then transfer them to a cooling rack.
Notes
These cookies can be stored at room temperature in an airtight container for up to 5 days.If you have leftover cookie dough, it can be frozen in an airtight container for up to 3 months.For a different twist, swap the white chocolate chips for pecans or add pecans on top for another delightful fall flavor.To enhance the flavor, consider sprinkling a bit of sea salt on top before baking. It's a fun addition that tastes amazing!To freeze the baked cookies: store in an airtight container (or ziptop freezer bag) for up to 2-3 months. Thaw them at room temperature before serving.Substitute for pumpkin pie spice: mix equal amounts of ground cinnamon, ground nutmeg, ground ginger, and ground allspice. Use 1/4 teaspoon of the mixture for this recipe.