This is a great snack to have with tea or mate, they are round sweets from Argentina called "alfajores" one is never enough.
INGREDIANTS
1/2 cup butter
1 cup sugar
1 egg
2 egg yolks
1 tsp. vanilla
2 tsp. lemon rind, grated
1 1/2 cup cornstarch
1/2 cup flour
1 tsp. baking powder
1/4 tsp. salt
METHOD
Cream butter; add sugar and beat until fluffy. Add egg and egg yolks, one at a time, beating well. Beat in vanilla and lemon rind. Sift together cornstarch, flour, baking powder and salt. Add to mixture and mix well.
Drop batter by small spoonfuls onto well buttered baking sheet. Bake at 350 degrees for 15 minutes. Remove immediately. Sandwich the cookies together with (dulce de leche) condensed milk, and if you like then dip them in melted chocolate or just dust them with icing sugar. Enjoy!
Makes 40 cookies.
(source: World-Recipes.info)