For pumpkin bars:
In a large mixing bowl, beat butter and brown sugar until light and fluffy.
Beat in eggs, corn syrup, vanilla, and pumpkin.
In a medium bowl, combine flour, pumpkin pie spice, ginger, clove, salt, and baking powder.
Add to the mixing bowl, and beat until just combined.
Fold in semi-sweet chocolate chips.
Pour batter into a greased or parchment paper-lined 9-inch square baking pan.
Bake at 350 degrees for 30-35 minutes, or until a toothpick inserted near the center comes out clean.
Remove to a wire rack to cool completely.
For chocolate frosting:
In a large mixing bowl, beat cream cheese and butter until fluffy.
Add powdered sugar, cocoa powder, and vanilla, beating until combined.
Add 1 tbsp. milk, and beat until combined, adding more milk as needed to achieve desired consistency.
Beat for 3-4 minutes, or until light and fluffy.
Frost the pumpkin blondies, and sprinkle with mini chocolate chips. Cut and serve.