01 - Preheat the oven to 350°F. Line two baking sheets with parchment paper.
02 - In a medium bowl, whisk together flour, baking soda, salt, cinnamon, nutmeg, cloves, and ginger until well blended.
03 - In a large bowl, whisk together melted butter, pumpkin puree, brown sugar, granulated sugar, egg yolk, and vanilla extract until smooth and fully combined.
04 - Gradually add the dry ingredients to the wet ingredients, stirring just until incorporated. Do not overmix.
05 - Fold in the chocolate chips until evenly distributed throughout the dough.
06 - Using a tablespoon or cookie scoop, drop rounded balls of dough onto prepared baking sheets, spacing them about 2 inches apart.
07 - Bake for 11 to 13 minutes, or until edges are set and centers look slightly underbaked for optimal chewiness.
08 - Allow cookies to cool on the baking sheet for 5 minutes, then transfer to a wire rack to cool completely.