In stand mixer, beat butter and sugar until light and fluffy.
Slowly add in molasses and egg until well combined.
In a separate mixing bowl mix the flour, cocoa powder, baking soda, salt and cinnamon.
Slowly add to wet ingredients, beat on low until just combined.
With a medium cookie scoop, scoop dough and roll into sugar then place onto silpat or parchment lined baking sheet. Press each cookie with the palm of your hand to about 1/2 inch thick.
Bake cookies for 9-11 minutes or until cooked through.
Remove and let cool for 5 minutes then transfer to cooling rack. Now, time to eat!