01 - Preheat 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 evenly distributed.
03 - In a large bowl, whisk together melted butter, brown sugar, and granulated sugar until smooth. Add pumpkin purée, egg yolk, and vanilla extract; mix until fully combined.
04 - Gradually add the dry ingredients to the wet ingredients, stirring until just combined. Be careful not to overmix.
05 - Fold in chocolate chips until evenly distributed throughout the dough.
06 - Using a tablespoon or cookie scoop, drop dough onto prepared baking sheets, spacing about 2 inches apart to allow for spreading.
07 - Bake for 11–13 minutes, or until the edges are set and the centers look slightly underbaked for optimal chewiness.
08 - Allow cookies to cool on baking sheets for 5 minutes, then transfer to a wire rack to cool completely.