As any South American child could tell you, alfajores are rich, buttery cookies filled with delicious dulce de leche. They're equally suited as a special dessert with an afternoon tea, or for an anytime snack.
Make the cookie dough:
Cream the butter and sugar together, then mix in the remaining ingredients (except the dulce de leche) until well blended. Knead on a floured work surface until smooth and let rest for 15 minutes.
Make the cookies:
Roll the dough out to a thickness of about 1/4 inch and cut into 2-inch rounds. Place on a greased cookie sheet and bake in a preheated 300°F oven for 20 minutes.
When cool, spread some dulce de leche on the bottom of half the cookies and press another cookie on top, allowing some of the dulce de leche to squeeze from the sides. Dust with powdered sugar.
Makes about 12 cookies.