Whisk together the flour, cocoa powder, baking powder, and salt. Set aside.
Using an electric mixer on medium speed, beat the the butter and sugar until light and fluffy. Add the egg and vanilla, and mix well.
Reduce the mixer speed to low. Gradually add the flour mixture, mixing just until combined.
Cover and refrigerate the dough for 30 minutes.
Preheat the oven to 350°F (175°C). Line baking sheets with parchment paper or silicone liners.
Place the dough on a work surface lightly dusted with cocoa powder. Roll the dough to 1/8-inch thick, and then use a 2 & 1/2-inch round cookie cutter to cut into rounds.
Transfer the cut cookies to the prepared pans. Bake, one pan at a time, for 15 to 18 minutes, or until the cookies just appear set.
Place the pans on wire racks, and allow the cookies to cool completely.
Notes
Store in an airtight container at room temperature up to 5 days.
Recipe adapted from King Arthur Baking.
Author: Jennifer McHenry
Course: cookies
Cuisine: American
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