While this was an excellent recipe just the way it was, I did adapt it slightly using just a dash less cardamom. I like the subtle warmth the spice brings to the cookies, but I found 1 1/2 tsp. sufficiently conveyed that. I also used ground cardamom instead of grinding my own like Niall suggests. She raises an important point that spices lose their freshness quickly, but I had just purchased the cardamom and it was used so sparingly that I’m happy with the results. If you’d like to use fresh cardamom, grind the seeds from 20 cardamom pods in an electric spice grinder, mini food processor, or mortar/pestle and use immediately.
Slightly adapted from: Sweet!
Position oven racks in the center and top third of the oven and preheat oven to 375 F. Line two baking sheets with parchment or a silicone baking mat. Sift together the flour, cream of tartar, baking soda, and salt (This is important, to completely combine the cream of tarter and baking soda, and to break up any clumps). Beat the butter and sugar in a medium-size bowl with an electric mixer at high speed until the mixture is light in color and texture, about 3 minutes. One at a time, beat in the eggs, then the vanilla. Reduce the speed to low. In four equal additions, add the flour mixture, beating the dough until it’s smooth after each addition.
To make the spiced sugar, combine the ground cardamom, sugar, and cinnamon in a small bowl. Using a level tablespoon of dough for each cookie, roll the dough into walnut-size balls. A few at a time, toss the balls in the spiced sugar to coat, and place about 2 inches apart on the cookie sheets. Sprinkle the tops of each cookie with a bit of the spiced sugar.
Bake until the edges of the cookies are crisp and lightly browned, but the centers are still a bit soft, 8-10 minutes. Rotate the cookie sheet halfway through baking. Cool on the sheets for a few minutes, then carefully transfer to a wire rack to cool completely. The cookies can be stored in an airtight container at room temperature for up to 5 days.