Preheat oven to 350 degrees. Use an electric mixer at medium speed to beat
buer, sugar and vanilla until light in color, about 5 minutes. Sift flour, baking
powder and baking soda into the bowl. Beat again until just fully combined, about
30 seconds. Take care not to overbeat.
Shape dough into 20 balls and place them on a parchment‐paper‐lined baking
sheet. Bake until cookies puff and crisp but do not color, about 10 - 15 minutes
(watch to make sure they do not overbake). The cookies should have no, or very
little, coloration and should crack slightly during cooking.
Remove cookies from oven and let cool completely before eating.