Preheat the oven to 350 degrees and line 2 cookie sheets with parchment paper or a silicone mat.
Using a large bowl, whisk together the flour, baking soda, ground cinnamon, ginger, cardamom, allspice, nutmeg, salt, and black pepper.
Using another large bowl and hand mixer, beat together the butter and brown sugar until light and fluffy.
Beat in the eggs, one at a time until combined.
Beat in the vanilla until combined.
Gradually beat in the dry ingredients until combined and a dough has formed.
Sprinkle some flour onto a cutting board and roll the dough out into ¼ in thick.
Use the cookie cutter and cut out circles.
Place 12-14 circles onto a cookie tray and bake in the oven for 8-10 minutes or until the cookies are lightly brown.
Remove from oven and allow to cool for 5 minutes before removing and placing onto a wire rack.
Once all cookies have baked, allow cooling completely on the wire rack.
Using a small bowl, whisk together the chai sugar topping ingredients until combined.
Melt the butter in a small bowl.
Using the BBQ brush, dip it into the melted butter and lightly brush the butter onto the cookies.
Sprinkle the chai spiced sugar onto the cookies.
Using a large bowl, whisk together the maple icing ingredients.
If the icing is lumpy whisk in 1-2 more tsp of milk.
Scoop the icing into the piping bag.
Cut the tip off the piping bag and drizzle lines over the cookies.
Allow the icing to set before enjoying.