These are pretty good bars. I used Kahula for the top layer instead of the orange liqueur. (I know - kind of defeats the purpose of B-52 bars). In each layer, I added a little more liqueur than...
I had to increase the Irish cream to 1/2 cup in order to moisten all of the icing sugar, and I found the top layer to be a little thick. That being said these are quite tasty.
I really love these bars...very rich..a small portion is all you need....needed more liqueur for icing sugar...but on the whole...I would make this agin