This super easy bar recipe has all the flavors of the holiday season!
Preheat oven to 350 degrees; grease 9x13" pan and set aside.
Beat together sugars, butter, and molasses until well blended, about 30 seconds.
Add egg and vanilla; beat until mixed.
Add flour, spices, baking soda, baking powder, and salt; mix until just blended.
Spread batter into prepared pan; bake approximately 30 minutes at 350 degrees, or until knife inserted in center comes out clean; let cool.
OPTIONAL: Frost with Browned Butter Cream Cheese Icing.