In a large bowl, sift the flour. To the sifted flour add all the ground spices and salt. Using a whisk, mix the spices thoroughly with the flour. Set aside.
In the stand mixer bowl (or you can use another large bowl and a hand mixer), add the butter and brown sugar. Cream the butter and sugar till pale and fluffy for 2-3 minutes.
Start adding flour in parts and mix on low speed. Just when you see that all the flour has binded with the butter, stop mixing and dump the dough on a floured surface. The dough will be little crumbly but dont worry.
Gently bring it all together into a soft ball. Divide the ball into two and shape each half into rounds. Flatten the rounds and place each in a ziplock bag(or wrap in a cling film). Refrigerate overnight or for upto 2 days.
Take out the refrigerated cookie dough and place on the counter 30 minutes before you are ready to make cookies. Line two large cookies sheets with parchment paper. Preheat oven to 350F.
Place another large sheet of parchment on your work surface and dust the sheet with flour liberally. Flour your rolling pin as well since this dough tends to stick and you want to be able to pick up the cookies after cutting them.
Using the rolling pin, roll the dough into ¼ inch thickness. Using a 3 inch round or fluted round cookie cutter, cut into cookies. For half the cookies which will go to top of sandwich, you can use 1 inch fluted star or round cookies cutter to cut the center out.
Dust spatula with little flour and use it to transfer the cookies to the baking sheet. Make sure that you count and have even number of bottoms and top cookies.
Gather the scraps and repeat the process until all the dough is exhausted.
Bake the cookies for 8-10 minutes until they start to turn light brown on the sides/bottom. Pull the sheets out of the oven and let the cookies cool down for 5-7 minutes on the sheet itself before transferring to a cookie rack.
Let the cookies cool down completely before you fill them. Place 1 tablespoon of Dulce de leche on the bottom cookies and sandwhich with the top cookies.
Store the cookie in a single layer (else they stick to each other). Enjoy!