Preheat oven to 350 degrees F, and line a baking sheet with parchment paper.
In a large mixing bowl, stir together, butter, sugar, egg, and vanilla extract.
Add in almond flour, coconut flour, baking soda, and salt. Cut open the tea bags and add the tea. Stir together until a dough forms.
Use your hands to roll the dough into 12 balls, about 1½ inch in diameter. Drop them on the baking sheet 2-3 inches apart and use your hands to flatten them to about ½ inch.
Sprinkle with more sugar on top, then bake for 10-12 minutes.
Remove from the oven and cool for 10 minutes before transferring them to a cooling rack to cool completely.
In a bowl, stir together ingredients for the glaze until thick but spreadable. You can add a bit more egg nog if the mixture is too thick.
Frost each cookie. If you want, sprinkle with a bit of cinnamon, and enjoy!