Based on you travelling with it...
Alcohol allowances
You can bring in either, but not both, of the following:
1 litre of spirits or strong liqueurs over 22 per cent volume
2 litres of fortified wine (such as port or sherry), sparkling wine or any other alcoholic drink that's less than 22 per cent volume
Or you can combine these allowances. For example, if you bring in one litre of fortified wine (half your full allowance) you can also bring in half a litre of spirits (half your full allowance). This would make up your full allowance. You can't go over your total alcohol allowance.
In addition you may also bring back both of the following:
16 litres of beer
4 litres of still wine
If you are posting, 1 litre of anything is a safe bet... I'm not sure how they would work out tax on a home-made product?
If it was Labelled (as a trading product) I guess they could 'gesdimate' based on average US prices, Unless it was clearley marked 'gift'
Which you would do anyway... Being an actual gift!
hth, al.