1/2 cup confectioners' sugar
1 2/3 cups all-purpose flour
1/2 cup unsweetened cocoa powder
1 1/2 teaspoons baking powder
1/4 teaspoon salt
8 tablespoons (1 stick) unsalted butter, at room
1 1/4 cups sugar
1/2 teaspoon vanilla extract
Preheat an oven to 350°F. Grease 2 baking sheets with butter.
Put the confectioners' sugar into a bowl and set aside.
In another bowl, using a wooden spoon, stir together the flour, cocoa, baking powder and salt. Set aside.
In a large bowl, using an electric mixer, beat the butter and sugar on medium speed until creamy, about 3 minutes. Turn off the mixer and scrape down the bowl with a rubber spatula. Add 1 egg and beat on medium speed until blended. Add the other egg and vanilla and beat until blended.
Turn off the mixer and add the flour mixture. Beat on low speed just until blended.
To form the cookies, using a tablespoon, scoop up a rounded spoonful of dough. Scrape the dough off the spoon into the palm of your hand. Roll the dough into a ball. Roll the ball in the confectioners' sugar until covered. Place 1 1/2 inches apart on prepared cookie sheets.
Bake about 12 minutes until tops are puffed and crackled.
(Do not over bake. Cookies are soft when hot but firm and chewy when cool. ) Remove to rack to cool. Store tightly covered up to 3 weeks with wax paper between layers.