Frosted Chai Spice Sugar Cookies

INGREDIENTS

and 3/4 cups (345g) all-purpose flour (careful not to overmeasure)

2 tsp

cream of tartar

1 tsp

baking soda

1/2 tsp

ground cinnamon

1/2 tsp

salt

1 cup

unsalted butter, melted

1 cup

granulated sugar

1/3 cup

packed light brown sugar

large egg, at room temperature

2 tsp

vanilla extract

1/2 cup

granulated sugar

and 1/2 teaspoons ground cinnamon

1 tsp

ground ginger

1 tsp

ground cardamom

1/2 tsp

ground allspice

1/2 cup

unsalted butter, softened to room temperature

and 1/2 cups (300g) confectioners' sugar

1 tsp

vanilla extract

3 tbsp

heavy cream (preferred) or milk

seeds scraped from 1/2 of a split vanilla bean

1/8 tsp

salt