Preheat oven to 325 degrees
Whisk flour, cocoa, ginger, cinnamon, nutmeg, pumpkin pie spice, salt, baking soda & baking powder in bowl.
In mixer- beat butter & brown sugar with paddle attachment until well combined & fluffy.
Beat in eggs & molasses.
Reduce speed to low & add dry mixture
Beat until well combined & pulled away from sides of bowl
Gather & press flat onto cookie sheet- making a smooth layer. (you will have one large cookie rectangle)
Score cut marks into the dough with a butter knife.
Sprinkle with chocolate jimmies
Bake for 10 - 12 minutes
Remove & allow to cool in pan on wire rack.