In a large mixing bowl, beat the butter and sugar together until light and fluffy.
Add the maple syrup, egg, and vanilla.
Beat again until well combined.
In a separate bowl, mix together the flour, ground tea, cream of tartar, baking soda, cinnamon, nutmeg, and salt.
Add dry ingredients, 1 cup at a time, to the wet ingredients and beat until combined.
Continue doing this until all of the dry ingredients are mixed in.
The dough will appear crumbly but should stick together.
Let the dough chill in the refrigerator for about 20 minutes.
Preheat the oven to 375 degrees Fahrenheit and line a large baking sheet with parchment paper.
Mix all of the topping ingredients into a shallow bowl until combined.
Remove the dough from the refrigerator and roll about 1 ½-2 tbsp of the dough into a ball.
Roll the ball into the sugar mixture and then place onto the baking sheet.
Repeat with the remaining dough.
Bake for about 10-12 minutes until slightly golden.
Let cool for about 5 minutes before transferring to a cooling rack to cool.