In a small bowl mix the flour, baking soda, salt, cinnamon, ginger, clove, allspice, and cayenne. Set aside.
In a medium bowl cream the butter and brown sugar for about 2 minutes or until light and fluffy.
Add the egg and molasses and mix until combined.
Add the dry ingredients into the wet ingredients in 3 parts. Mix just until combined after each batch.
Preheat the oven to 350 degrees
Measure 2 teaspoons of dough and roll into a ball them flatten and put it on a baking sheet lined with parchment paper.
Bake at 350 degrees for 8-10 minutes.
Remove cookies from the oven and cool completely. (See note)
In a small bowl mix the powdered sugar and ginger ale until combined. The icing will be thin.
Dip each cookie into the icing bowl and coat the top. Sprinkle a little extra cayenne pepper. Set aside to allow the icing to harden. Will take about 10-15 minutes. (See note) Enjoy!