Instructions

1. Preheat oven to 350F or 180C.
2. Put flour in a large bowl.
3. Add the egg yolks and work with a fork or your hands to form crumbs.
4. Add the milk, vinegar, and melted butter.
5. Form a dough, add water if necessary, one teaspoon at a time.
6. Knead to a smooth dough, about 10 minutes.
7. Wrap in plastic wrap and let it rest, refrigerate at least 2 hours and up to 2 days.
8. Roll thin and cut the Alfajores, prick with a fork, bake for 10-12 minutes or until golden brown.
9. Fill with the Dulce de Leche once they are cool.