64 grams confectionner's sugar
213 grams all-purpose flour
64 grams cocoa powder
1 + ½ tsp baking powder
a pinch of kosher salt
113 grams butter (1 stick)
250 grams sugar
2 large eggs
½ tsp vanilla extract
Prep time: 15 mins
Bake time: 10 mins
Preheat the oven to 350 F (176 C), line 2 cookie sheets with parchment paper. Put the powdered sugar into a small bowl and set aside.
In a medium bowl, whisk together flour, cocoa powder, baking powder and salt. In a large bowl, using a stand mixer or an electric mixer, beat the butter and granulated sugar on medium speed until light and fluffy, about 3 minutes. Turn off the mixer and scrape down the bowl with a rubber spatula.
Add the other egg and the vanilla, beat until blended. Turn off the mixer and add the flour mixture. Mix on low speed just until blended. Scrape down the bowl.
Scoop some of the dough. Roll the dough into a ball, set it on a large plate, and shape the rest of the dough into balls in the same way.
When all the dough has been shaped, roll the balls in the powdered sugar. Place the balls on the prepared cookie sheets, spacing then about 3cm apart.
Bake the cookies 1 cookie sheet at a time until crackled and puffed, 10 - 12 minutes. Let cool for 15 minutes, then, using an offset spatula to move the cookies to a cookie rack. Let cool completely and serve.