Preheat oven to 350°F. Line several cookie sheets with parchment paper.
Mix together almond flour and sugar in a large bowl. Set aside.
Using the whisk attachment of your electric mixer, beat egg whites with salt until stiff peaks form. Fold in almond extract.
Fold egg whites into flour-sugar mixture until it forms a dough.
Prepare a plastic bag with granulated sugar and one with powdered sugar.
Using a cookie scoop, scoop dough into 1" balls then drop into the bag with granulated sugar to coat. Remove and drop into the bag with powdered sugar to coat. (Note: The granulated sugar helps to keep the powdered sugar from dissolving into the cookie.)
Place on the prepared cookie sheets, spacing about 1 ½" apart. Gently flatten slightly with your hand.
Bake for 15 minutes then remove to rack. Let cool for 5-10 minutes then move them to a wire rack to cool completely.
Notes
STORE/FREEZEStore the baked cookies in an airtight container at room temperature for up to 1 week. Their chewy texture stays perfect for days.Freeze cookies by placing them on a baking sheet until firm, then storing in a freezer bag or container. They keep well for up to 4 months.