01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, letting the edges hang over for easier removal.
02 - In a medium bowl, whisk together the all-purpose flour, cinnamon, nutmeg, ginger, cloves, baking soda, and salt until evenly combined.
03 - In a large bowl, thoroughly whisk together melted butter, packed brown sugar, and granulated sugar until smooth. Add the egg and vanilla extract, whisking until incorporated.
04 - Stir pumpkin puree into the wet mixture until fully blended.
05 - Fold the dry ingredients into the wet mixture gently, mixing just until combined to preserve tenderness; do not overmix.
06 - Gently fold semisweet chocolate chips into the batter, distributing evenly.
07 - Transfer batter to the prepared pan, smoothing the surface evenly. Bake for 28 to 32 minutes, or until a toothpick inserted in the center extracts with moist crumbs attached.
08 - Allow blondies to cool completely in the pan on a wire rack. Using the parchment overhang, lift them out, cut evenly into 12 squares, and serve.