Nice word. If you don’t know what it is, don’t look it up. Believe me.
Here is where I found it:
I was eating marchpane at the time out of my pocket and went on eating so as to gain time” – James Joyce, quoted in an article about early paps harassing him. Alison Flood, The Guardian – James Joyce and the paps
On the plus side Marchpane is also a bookshop.