- Preheat oven to 350°F.
- Butter an 8-inch square baking pan.
- Line bottom with a strip of parchment paper, leaving an overhang on two sides; butter paper.
- Dust paper and sides of pan with cocoa; set aside.
- In a medium bowl, whisk together cocoa, flour, ginger, pumpkin-pie spice, and baking soda; set aside.
- In a large bowl, whisk together butter, brown sugar, molasses, egg, and sour cream until smooth.
- Add flour mixture; stir just until moistened (do not over mix).
- Stir in chocolate chips.
- Transfer batter to prepared pan; smooth top.
- Bake for 30-35 minutes until a toothpick inserted in center comes out clean.
- Transfer to a wire rack; let cool completely in baking pan.
- Once cooled, use paper overhang and lift gingerbread from pan.
- Transfer to a cutting board, and cut into 16 squares.
- Before serving, dust bars with powdered sugar, if desired.
Makes 16 bars.
Approximate Nutrient Analysis per bar (not including powdered sugar dusting):
140 calories, 6 g fat, 4 g saturated fat, 25 mg cholesterol, 50 mg sodium, 21 g carbohydrate, 1 g fiber, 12 g sugar, 2 g protein