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Limoncello would not normally freeze solid because of the alcohol content.In standard 25%ABV limoncello some of the water in it freezes and forms ice crystals on the walls of the bottle in 30%ABV limoncello or above no noticable signs of freezing occur.Most limoncello recipes call for 50%ABV vodka but as you don't specify the strength of the vodka used or the size of the bottles I will have to guess at what you used if i am guessing wrong then let me know what you used & I can recalculate it.If you used 3x 70cl bottles of 40%ABV vodka adding 5 pints (2.84L) of water will reduce the alcohol content to 16.99%ABV. At that strength more of the water will freeze & as you have used glass bottles there will be a higher risk of them shattering in the freezer when the the ice expands.The only reason it is kept in the freezer is so it is ready to serve at a moments notice not to preserve it so at that strength it would be better to store it somewhere else & put a bottle in the freezer a few hours before serving.
Have a good holiday Debs! Where abouts fork?A question about the limoncello, is it risky putting it in the freezer given the above ingredients?