in a large bowl, sift together, the flour, the cornstarch, the baking powder, the baking soda and salt – set aside
in the bowl of a stand mixer, beat the sugar and butter until light and creamy about four minutes
add the yolks, one at a time and beat until combined
add the vanilla extract, the lemon zest if using and the brandy and be until combined
at the flour mix and beat until just combined
with the dough in cling film and refrigerate for 2+ hours
preheat your oven to 350° and line a lot baking pan with parchment paper or silicone mat
remove the dough from cling film and and cut to two large sheets of wax paper or parchment paper and place some of the dough on top of one sheet of paper and top with the other sheet and roll to 1/8-1/4 inch think. Refrigerate the dough not being worked on while you do this
cut the dough with 2 inch cookie cutter
place the cookies and you prepared sheet pan about 1 inch apart
you can bake right away, but I like to refrigerate for 10 minutes before baking
bake for 10 minutes until the edges are just a bit golden in color
cool completely before removing from your baking sheet
spread or pipe about 1 tablespoon of dulce de leche on one cookie and top with the other cookie and then roll on the desiccated coconut
I like to keep these in an airtight container in the refrigerator for about a week. They start to get very soft after a week.