Pumpkin Snickerdoodles

Ingredients

• 2 cups all-purpose flour ((240g))
• 3/4 cup unsalted butter (melted and cooled (170g))
• 1 teaspoon pumpkin pie spice
• 1 large egg yolk
• 1/2 cup pumpkin purée ((120g))
• 3/4 teaspoon baking soda
• 1 teaspoon vanilla extract
• 1 1/2 teaspoons cream of tartar
• 1/2 teaspoon kosher salt
• 1/2 cup granulated sugar ((100g))
• 1/2 cup light brown sugar ((107g))
• 1/4 cup granulated sugar ((for coating, 50g))
• 1 teaspoon pumpkin pie spice ((for coating))