I was surprised with this, today. My father and brother decided to use up the remaining icing from the Christmas Lemming cake, and made a bunch of sweets out of it - Lemmings ones...
... Along with an entrance trapdoor (with its planks made out of cut-up bits of
Matchmakers chocolate-sticks), and a traditional earth-and-rock-style exit door, complete with little torches!
Here's another picture, showing the setup from the other side.
I was tickled pink by this, I can tell you - especially by the entrance detailing.