Step 1

In a medium bowl, whisk together the flour, cream of tartar, baking soda, salt, and chai spice.

Step 2

In a separate large bowl, use an electric mixer to cream butter and sugar until fluffy, about 3 minutes. Add eggs and vanilla and beat an additional 1-2 minutes.

Step 3

Pour the dry ingredients into the butter mixture and mix on low speed just until the flour is incorporated. Do not overmix.

Step 4

Refrigerate the dough for at least 30 minutes, or overnight.

Step 5

When ready to bake, preheat the oven to 350°F.

Step 6

For the topping, mix the granulated sugar and chai spice in a small bowl.

Step 7

Scoop the dough into 1 ½ tablespoon scoops and roll each into a ball. Roll the ball in the chai-sugarmixture.

Step 8

Arrange about 3-inches apart on a cookie sheet. Bake for 7-10 minutes, or until the edges of the cookies are just starting to turn brown.

Step 9

Allow to cool on the cookie sheet for several minutes, then transfer to a wire cooling rack.