Create your chai spice blend in a small bowl with the cinnamon, cardamom, ground ginger, allspice and ground cloves. You will not use all of it.
To a bowl add the flour, baking powder, baking soda, salt and 2 teaspoons of the chai spice blend. Stir and set aside.
To a plate or shallow bowl add 1/4 c granulated sugar and 1 tsp of the chai spice blend. This is what we roll the cookie dough balls in. Set aside.
To another bowl or a stand mixer, mix together the softened butter and sugars for 3-4 minutes until light and fluffy.
Add the egg and vanilla, continue beating until well incorporated. Scrape the sides and mix again.
With the mixer on low slowly add the dry ingredients into the wet. Scrape the sides and mix on low until everything is fully incorporated.
Create 2 tablespoon size dough balls, form in a ball and roll in the chai sugar. You should have 15 cookies in total.
Chill for 20 minutes while the oven preheats to 350 degrees.
Bake in rounds in the middle rack on parchment lined sheet pans for 10 minutes. Make sure the cookes are 2 inches apart.
Allow to cool on the counter on the sheet pan for 10 minutes and then on either a cooling rack or on parchment paper on the counter.
Make the glaze by whisking together powdered sugar, milk, vanilla and 1 teaspoon of the chai spice mix to a bowl until smooth and all lumps are worked out.
If your cookies bubbled in the middle while baking, gently press the centers down to create a shallow well. Pour a couple teaspoons of the glaze on each cookie. Optional step is to sprinkle the wet tops with a tiny pinch of chai spice blend for a more forward chai flavor.
Allow to harden for an hour.