01 - Preheat oven to 350°F (175°C). Line a 9x9-inch baking pan with parchment paper, allowing an overhang for easy removal.
02 - In a medium bowl, whisk together flour, cinnamon, nutmeg, ginger, cloves, baking soda, and salt.
03 - In a large bowl, whisk together melted butter, light brown sugar, and granulated sugar until smooth. Add egg and vanilla extract, whisking until fully incorporated.
04 - Stir pumpkin puree into the wet mixture until evenly combined.
05 - Gently fold the dry ingredients into the wet mixture just until combined, avoiding overmixing.
06 - Add semisweet chocolate chips and fold to distribute evenly.
07 - Transfer batter to the prepared pan and spread evenly with a spatula.
08 - Bake for 28 to 32 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs.
09 - Allow blondies to cool completely in the pan on a wire rack. Lift out using parchment, cut into 12 squares, and serve.