Alfajores Argentinean Style
Preheat oven to 350 levels F (175 levels C). Line baking sheets with parchment paper. Whisk collectively the flour, cornstarch, baking soda, and baking powder; put aside.
Beat the butter and sugar with an electrical mixer in a big bowl till gentle and fluffy. Add the egg yolks separately, permitting every yolk to mix into the butter combination earlier than including the subsequent. Beat within the vanilla rum, vanilla extract, lemon extract, and lemon zest with the final egg. Gently fold within the flour combination with a spoon, making a crumbly dough. When the dough turns into cohesive sufficient, press it collectively right into a ball together with your palms. Wrap with plastic wrap and chill for 30 minutes to 1 hour.
Roll out the dough, utilizing as little flour as attainable, about 1/four inch thick. The dough may have an uncommon consistency. Reduce with a small spherical cookie cutter. Proceed urgent the dough collectively, rolling it out, and chopping till you might have used all of it. Place cookies half inch aside on the ready cookie sheets.
Bake within the preheated oven till set however not browned, 7 to 10 minutes. Take away the cookies instantly to chill on a wire rack.
Unfold the underside of a cooled cookie with a teaspoon of dulce de leche, then sandwich along with one other cookie till the caramel oozes out the perimeters. Roll the perimeters within the shredded coconut.