Prepare the chai spice:

1. In a small mixing bowl, whisk together all of the spices until well-combined. Set aside.

Make the chai cookies:

1. Preheat the oven to 375F. Prepare 1-3 baking sheets with parchment paper or a silicone baking mat (I typically do 1 and then work in batches for even baking).
2. In a large mixing bowl, whisk together the melted butter, brown sugar, white sugar, eggs, and vanilla, until smooth and well-combined.
3. In a separate mixing bowl, whisk together the flour, 4 teaspoons chai spice blend, baking soda, baking powder, and salt, until well-combined.
4. Add the dry ingredients into the large mixing bowl with the wet ingredients. Fold together with a spatula until well-combined.
5. In a small mixing bowl, make the chai sugar by mixing together the white sugar with the remaining tablespoon of chai spice.
6. Using a medium cookie scoop, scoop the cookies out and roll each cookie in the chai-spiced sugar.
7. Place the cookie balls on the prepared baking sheet(s). You can fit about 5-6 cookies onto each prepared baking sheet.
8. Place the sheet(s) into the oven and bake for 13-14 minutes, or until the edges are beginning to turn slightly golden.
9. Allow the cookies to cool for 5 minutes, then transfer onto a cooling rack to fully cool.

Make the glaze:

1. Once the cookies are fully cooled, begin making the glaze by adding the confectioners' sugar, milk and vanilla to a medium mixing bowl. Whisk together until smooth, then drizzle over the cooled cookies with a spoon.