These are such delicious and pretty cookies. I decided to try dehydrated egg yolk in them, and it worked very well, except the dough was very dry at the end, and I wasn't sure if it was the fault of the (reconstituted) egg yolk or my flour or what. I just kneaded the dough together, and it was fine with no extra liquid. Other than that I had no problems. The icing, though very tasty, did seem a little strong at first, and I wondered if I should have used all that rum. They mellowed, however by the next day, and were a hit with all at work. This was a little sad because I was looking forward to eating all of them by ourselves. Thank you very much for this recipe. It will definitely get made again here.