I set aside one bottle each from my first two batches so I could see what happens when you let them rest for a long time. Both of these rested for over 6 months in my basement and then I put them in the freezer for a while and tasted them again. There is no question that resting the limoncello smooths out the flavor. These two batches are nearly indistinguishable at this point. They are both very sweet and syrupy, with a little alcohol heat in the flavor. Neither has the alcohol “roar” that I noted in the initial review of the first batch.
If I had to identify a difference between them, I’d say that the first batch has many more lemony notes on the finish than the second batch. I don’t know why that would be but it definitely leaves a lemon oil finish in your mouth. Interestingly, the chemical flavors have also died down. These two batches won’t make it to the one year mark (they’re already frozen, I might as well finish them off…) but the effects of aging are clearly positive. I’ve made quite a bit of limoncello this year so I’ll be surprised if at least some of the batches don’t make to a year old. When they do I’ll post the results but I can predict them already in one word, smoother.