Preheat the oven to 350°F.
In a medium bowl, combine the flour, natural baking soda, and salt. Now, in a larger bowl, blend together the butter, sugar, brown sugar, molasses, ginger, allspice, and cinnamon until the mixture is well incorporated.
In a separate bowl, whisk the egg thoroughly, then add it to the sugar and spice mixture. Stir until the ingredients are smoothly combined.
Gradually add the flour mixture to the wet ingredients and stir until there are no visible dry spots.
Allow the cookie dough to rest for 15 minutes to let the flour absorb the moist ingredients.
On a small plate, spread out 5 tablespoons of sugar.
Shape the dough into 1 1⁄2-inch balls, making approximately 16 in total.
Roll each dough ball in the sugar, making sure to evenly coat.
Place the dough balls 2 inches apart on an ungreased baking sheet.
Bake for 15-18 minutes until the cookies spread and feel just slightly firm to the touch. Remember, these cookies are darker in color, so touch is the best indicator of readiness.
After baking, let your cookies cool on the baking sheet for 10 minutes before transferring them to a cooling rack for complete cooling.
The cookies can be stored in an airtight container for 4-5 days or refrigerated for a week. If you do refrigerate them, allow them to come to room temperature before you eat them for the best flavor.