Preheat oven to 350°F
Line a 9x13 inch baking pan with parchment paper
Mix flour, ginger, cinnamon, allspice, nutmeg and salt in a bowl
In a separate bowl, mix butter, brown sugar and white sugar together. Add in egg and vanilla. Make sure there are no lumps and egg is completely mixed in. Mix in pumpkin puree.
Combine the flour mixture with the wet mixture. Mix until mixture is smooth and blended.
Add in cornflakes and butterscotch chips and mix until evenly distributed
Pour batter into the parchment paper lined baking pan. Spread mixture evenly in pan. Add additional cornflakes on top of batter mixture.
Bake for 40 to 50 minutes or until chopstick comes out clean when inserted in the middle of blondies.
Let blondie cool on wire rack before cutting. Voilá, enjoy!