Tango Cookies (Alfajores)

I made these exactly as written in the recipe and they were just perfect. The cookies are nice, and the addition of ground almonds makes them a little crumbly, but not so much they are not strong enough to sandwich. And of course dulce de leche is excellent pretty much anywhere.

I made dulce de leche the easy way - I gently simmered a can of sweetened condensed milk for about 3 hours. I know it says on the can not to do this, but I've done it many times with no explosions, and a quick search online found that many people from South America do this also and as long as it's completely covered with water, it seems to be fairly safe. Note however that I take no liability for caramel explosions whatsoever...