Beat the egg whites and the sugar on high speed for 2-3 minutes.
Add the almond flour and fold it in until evenly incorporated.
Refrigerate for 15 minutes.
Create 1-inch balls with your hands and dust generously with powder sugar.
Drop each ball in a bowl with powdered sugar and roll it to cover completely.
Place on a cookie sheet and bake at 325° for 12 minutes.
Remove from the oven and let cookies rest for 10 minutes. Move to a cooling rack and let them cool completely. Yields about 36 cookies.