Step #1 Whisk together the flour, spices, salt & baking soda, & set aside.
Step #2 In a large bowl, beat together the butter & sugar, then beat in the molasses.
Step #3 Add the dry ingredients alternately with the rum.
Step #4 Using a cookie or muffin scoop, scoop out round balls of dough somewhere in size between a ping-pong ball & a golf ball, & place the balls on a parchment-lined or lightly greased baking sheet.
Step #5 Bake the cookies in a preheated 375°F oven for 11 to 12 mins, until they crack on top but haven't yet browned around the edges.
Enjoy the Soft Molasses Cookies (King Arthur Flour Recipe) recipe