Preheat oven to 350 and spray 17x12" baking pan with cooking spray.
Mix together butter, brown sugar and white sugar with a mixer until fluffy.
Add eggs and yolk, 1 at a time and mix well.
Add in vanilla and molasses (or honey if substituting). Reduce mixing speed to low.
In separate bowl, mix together flour, baking soda, salt and spices.
Slowly add flour mixture to butter mixture, beating just until combined.
Pour into prepared pan and bake 350 for 25-30 minutes. Cool in pan on wire racks.
Enjoy!