What can replace black lemon in a blueberry and juniper liqueur?

Expanded Explanation

Black lemon gives this liqueur dry citrus depth, gentle bitterness and a slightly smoky fermented character, so the best replacement should add more than simple freshness. Use two thin strips of lemon zest plus one small strip of orange zest for a brighter substitute, or use a small piece of dried lemon peel if you want a darker, more mature citrus note.

If you want to keep the dry, mysterious edge, add lemon zest and reduce the lemon juice slightly until tasting. A tiny pinch of cacao nibs or one extra crushed juniper berry can help recreate some of the earthy depth, but avoid adding too much spice because blueberry can quickly lose its clean fruit character.

Do not replace black lemon with too much fresh lemon juice at the start of maceration. Juice changes acidity more than aroma and can make the finish sharp. It is better to infuse with zest or dried peel, then adjust brightness with lemon juice after filtration and sweetening.