Alfajores (Dulce de Leche Sandwich Cookies)

Instructions

1. 1

   In a bowl, combine the flour and baking powder. Set aside.

2. 2

   In another bowl, cream the butter and sugar with an electric mixer. Add the egg yolk and vanilla and beat until smooth. Using a wooden spoon, stir in the dry ingredients. Shape the dough into a disk. Wrap in plastic wrap and refrigerate for about 30 minutes.

3. 3

   With the rack in the middle position, preheat the oven to 180°C (350°F). Line a baking sheet with parchment paper.

4. 4

   On a floured surface, roll the dough to a thickness of about 3 mm (1/8 inch). Using a 6-cm (2 1/2-inch) round cookie cutter, cut out 18 cookies. Using a thin spatula, lift each cookie onto the baking sheet.

5. 5

   Bake until the cookies begin to colour, about 12 minutes. Let cool completely on the cookie sheet before handling.