Chai Snickerdoodles

For the Cookies:

• 2 ½ cups flour *see note
• 1 teaspoon baking soda
• ¾ teaspoon salt
• 1 ½ teaspoons cream of tartar
• 1 cup (16 tablespoons / 2 sticks) unsalted butter at room temperature
• 1 ½ cups granulated sugar
• 2 large eggs
• 1 tablespoon vanilla extract

For the Spice Mixture:

• ¼ cup granulated sugar
• 1 ½ teaspoons cinnamon
• 1 ½ teaspoons cardamom
• ½ teaspoon cloves
• 1 teaspoon ginger
• ¼ teaspoon freshly ground black pepper