Two shortbread-style cookies made with more cornstarch than flour, so they crumble the moment you bite them, sandwiched with arequipe, the Colombian name for dulce de leche, and dipped in dark or white chocolate. The cornstarch is what makes an alfajor an alfajor. Makes about 10.
The dough is soft because of all the cornstarch. If it fights you when you roll it, rest it in the fridge for twenty or thirty minutes and it will behave. Alfajores are better on the second day: the moisture in the arequipe softens the cookies, and what starts out sandy turns tender. Keep them in a tin, not the fridge, which dries them out. Instead of chocolate you can roll the edges in shredded coconut, dust them with icing sugar, or leave them plain.