Alfajores de Dulce de Leche

Alfajores de dulce de leche are Argentina’s most beloved cookie — two tender, melt-in-the-mouth cornstarch cookies sandwiching a thick layer of dulce de leche, often rolled in coconut or dusted with powdered sugar. They are the dessert of Argentine tea time, sold in every bakery, and made by every grandmother. The cookies are delicate, sandy, and barely sweet, which is exactly what makes the sweet, caramel-like dulce de leche the star.

Why this recipe works: The secret is cornstarch: a high proportion of cornstarch to flour gives the cookies their signature crumbly, shortbread-like texture — they literally crumble and melt on the tongue. They are baked just until set, staying pale rather than golden. The dulce de leche is spread generously, and the assembled cookies are chilled so the filling sets and the cookies soften slightly into the perfect bite.

Key ingredients

• Cornstarch: the key to the melt-in-the-mouth texture.
• Flour and butter: the cookie base.
• Egg yolks and a little sugar: richness and sweetness.
• Dulce de leche: the filling — good quality or homemade.
• Shredded coconut (optional): rolled around the edges.

Tips for the best alfajores

Do not overwork the dough — mix just until it comes together, then chill it before rolling. Roll and cut into even rounds, and bake at 350°F just until the edges barely color, 10 to 12 minutes; pale is correct. Cool completely, then sandwich with a generous layer of dulce de leche. Roll the edges in coconut if you like, and chill for at least 1 hour before serving — the filling sets and the cookies soften just enough.

Variations and storage

Dip half of each alfajor in chocolate, add a dusting of powdered sugar, or use a different filling like chocolate ganache. Alfajores keep 5 days in an airtight container at room temperature — they actually improve with a day of rest — and freeze well for 2 months.

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