Preheat the oven to 325°F. Lightly grease (or line with parchment) two baking sheets.
Blend the almond paste, sugar, and salt until the mixture becomes uniformly crumbly; this is best done in a stand mixer though a hand mixer will work as well.
Add the egg whites gradually, while mixing, to make a smooth paste. Stir in the flavorings.
Scoop the dough by heaping tablespoons onto the prepared pans.
Sprinkle the cookies heavily with confectioners’ sugar, then use three fingers to press an indentation into the center of each cookie.
Bake the cookies for 20 to 25 minutes, until they’re brown around the edges. Remove them from the oven, and let them cool right on the pan.
Yield: 21 cookies.
Adapted from King Arthur Flour