In a mixing bowl, combine the flour, salt, baking soda, and spices. Stir them together. Set this aside for now.
In your mixing bowl, beat the butter and shortening until smooth and fluffy.
Mix in the egg, brown sugar, and molasses. Beat until creamy.
Add in the dry ingredients. Mix well. This will be a very thick cookie dough.
Cover and refrigerate the dough for 1-2 hours.
Preheat your oven to 350 degrees.
Place the granulated sugar in a small bowl.
Using a cookie scoop or spoon, measure out a small portion of dough and roll it into a ball with your hands. The ball should be about the size of a ping-pong ball.
Roll the dough ball in the sugar to coat.
Place the ball on a cookie sheet that is lined with parchment paper.
Repeat this process with the rest of the dough, baking about 12 cookies at a time on a standard cookie sheet.
Bake for 10 minutes.
Allow the cookies to cool for a few minutes, then place them on a rack to cool completely.
NOTE: Watch the video to see how I do this with the parchment paper, baking stone, and racks. It's how I bake ALL cookies, with no time wasted between pans.