In a small bowl, whisk together the flour, baking soda, and salt. Pour into the bottom of a clean quart mason jar.
Layer the spices (ginger, cinnamon, nutmeg, cloves, allspice, and cardamom if using) on top of the flour mixture.
Add the granulated sugar as the next layer.
Add brown sugar if using as a separate layer.
Add dry molasses powder (or the brown sugar + cocoa mix) as the final layer.
Seal the jar and attach baking instructions.
To Bake the Cookies:
Preheat oven to 350°F.
In a mixing bowl, whisk together the melted butter, molasses, and egg.
Pour in the contents of the jar and stir until a soft dough forms.
Roll dough into balls and coat in granulated sugar.
Place on a parchment-lined baking sheet and bake for 9–11 minutes, until edges are set and centers appear crinkled.
Cool completely before serving for the classic gingersnap crunch.