Dulce de Leche Hamantaschen
For the dough
For the dulce de leche filling
To serve
  1. Remove the labels from both cans of sweetened condensed milk. Place the cans on their sides in the bottom of large pot. Fill the pot with water. Bring the water to a boil, then lower the heat and simmer for at least 3 1/2 hours. Add water if necessary, so that the cans are completely submerged in water. Use tongs to remove the cans from the hot water; allow the cans to cool for least 1 hour.
  2. Open the cans and scoop out the caramelized dulce de leche. Add the salt and vanilla extract, and whisk to combine thoroughly. Set aside.
  3. In a medium size bowl, whisk the flour, cornstarch, baking powder and salt.
  4. In the bowl of a stand mixer, combine the butter and sugar. Cream on medium speed until lighter in color and fluffy. Add the eggs and lemon zest and thoroughly combine. Add the flour mixture to the bowl of the mixer, and beat on low speed until the dough comes together in a ball, about 1 minute. Dump the dough onto a large piece of plastic wrap, bringing it together into a ball, then flatten with your hands. Wrap the dough tightly and refrigerate for at least 45 minutes.
  5. Preheat the oven to 350 F. Line a baking sheet with parchment paper. Place the coconut flakes on the baking sheet and toast until lightly golden brown, about 8-10 minutes. Pour the coconut into a bowl and set aside.
  6. Cut the dough in half. Dust your work surface with flour. Working with one half, roll the chilled dough out to º inch thickness. Use a 3-inch round cutter to cut out as many circles as possible. Re-roll the scrapes and repeat with the second half of dough.
  7. Place a teaspoon of filling in the center of each circle. Fill a small bowl with water, dip your finger in and run it around the perimeter of each cookie. This is the glue that will hold the dough together. Pinch the top of circle together, then bring up the bottom of the circle, creating 3 distinct points. Pinch the corners tightly, and up the sides very tightly, enclosing the filling, so it doesnít spill out. Dulce de leche is a softer filling, so a tight seal is important.
  8. Place the shaped cookies 2-3 inches apart on the prepared baking sheet and place the cookies in the freezer for 15 minutes to help maintain their shape.
  9. Bake the cold cookies for 12-15 minutes until the edges are slightly golden brown. Remove from oven and sprinkle with toasted coconut and powdered sugar. Serves 15.