Make a well and add sugar, ground almonds, butter, and egg yolks.
Stir it together and then use your hands to knead the batter to make sure the butter is evenly distributed.
Roll into balls and flatten them slightly on the cookie sheet.
Press a blanched almond into the center of each cookie.
Bake for 15 minutes or until the edges become golden brown.
Transfer to a wire rack to cool.
Recipe Notes
*From Frieda's Fiestas: Recipes and Reminiscences of Life with Frida Kahlo by Guadalupe Rivera and Marie-Pierre Colle, Clarkson Potter Publishers, New York 1994
**The original recipe made over 50 cookies. I halved it.