1 hour ago, Kim Shook said:We all agreed that it was tasty but needed a little tweaking. It needed more lemon flavor – not sure if that means a few extra days steeping or more lemon zest. Any suggestions?
A lot of recipes say to let the ingredients "marry" for about a week or so after sweetening so I'd recommend that you taste it again in a week and see if that affects the burn you are tasting. I generally use an inexpensive 151 proof vodka for the initial extraction and don't have an issue with the harshness after it's been diluted and rested a while.
It looks like you used a microplane to zest the the lemons, I don't think you need more than a month for the extraction, though you could try. I've done all sorts of things when I forgot a batch!
It's possible that the missing lemon flavor is really tartness so you could also try squeezing a little wedge of lemon into your glass to see what you think. I'm sure it's not at all traditional but I like the addition of the fresh flavor.
And your glasses are perfection!
Edited to add that this recipe from Kathy Casey's book Sips & Apps is a delicious use of limoncello in a cocktail.