01 - Preheat oven to 350°F. Line a 9x9-inch baking pan with parchment paper, allowing an overhang for easy lifting.
02 - Whisk together flour, cinnamon, nutmeg, ginger, cloves, baking soda, and salt in a medium bowl.
03 - In a large bowl, whisk melted butter, brown sugar, and granulated sugar until smooth. Add egg and vanilla extract, whisking to combine.
04 - Stir in pumpkin puree until well incorporated.
05 - Fold dry ingredients into the wet mixture gently until no flour remains visible; avoid overmixing.
06 - Fold in chocolate chips until evenly distributed.
07 - Transfer batter to prepared pan and spread evenly.
08 - Bake for 28–32 minutes or until a toothpick inserted in the center yields a few moist crumbs.
09 - Allow blondies to cool completely in pan on a wire rack. Use the parchment overhang to lift out, then cut into 12 squares.