This is the version I made: WARNING INSIDE
The first time I made this recipe I used organic lemons and one or two of them gave off a slight wiff of mold. I cut that portion out and figured (wrongly, it will sadly turn out) that
that much grain alcohol would kill any form of mold.
Wrong. So very, very wrong.
At the time grain alcohol was close to $25 a bottle (not to mention the price of organic lemons) and I--in my stupidity--quadrupled the recipe to process enough for gifts. At the 40-day mark, the bottle was infused with gorgeous golden hues and I delighted in this first attempt at liqueur. Spinning open the lid I gave thanks to the monks who originally had the idea of aging limoncello in dark dry caves just as the rank odor of mold met my nose.
Fifty percent of limoncello's charm is the delightful buzz you get from it. Another 50% is the visual color and the citrusy notes as you inhale the aroma. Adding mold to that equation ruins it.
Not willing to believe this was actually the failure it was, I continue with the recipe, wasting all that sugar and ultimately another 40 days of my life. Mold is mold and it ain't going away, even when submerged in 151-proof alcohol. It's just preserved. I now understand some of the people I saw in Las Vegas.
I'll leave you to imagine the words that came out of my mouth as I poured $125 of mold eau de vie down the drain.
EDITED: I just realized THIS is the most expensive item I've wasted, not the $115 block of gianduja chocolate.
http://www.slowtrav.com/italy/notes/food/dh_limoncello.htm