2 3/4 cups all-purpose flour
2 teaspoons cream of tartar
1 teaspoon baking soda
1 1/2 teaspoons ground cardamom
1/4 teaspoon salt
1 cup unsalted butter, at room temperature
1 1/2 cups packed light brown sugar
2 eggs
1 teaspoon vanilla extract
1/4 cup granulated sugar
In a large bowl, sift together the flour, cream of tartar, baking soda, 1 teaspoon of the cardamom, and salt.
Combine the butter and brown sugar in the mixer.
Beat on medium speed for 1 minute.
Turn the speed to high and beat until very light and fluffy, 2 or 3 minutes.
Beat in the eggs, one at a time, and the vanilla at medium speed.
Add the rest of the dry ingredients gradually.
Refrigerate the dough for about an hour.
Stir together the granulated sugar and remaining 1/2 teaspoon of cardamom.
Coat small balls of dough with this mix.