How can I restore structure to a liqueur that tastes too soft?

Expanded Explanation

“Structure” in liqueur is the balance of alcohol backbone, sweetness, acidity, bitterness, and aromatic lift. When it goes soft, it’s usually missing one of those anchors — most commonly alcohol backbone or acidity. Start by identifying what feels absent: is it flabby-sweet, dull and low-aroma, or just lacking snap?

For backbone, the cleanest fix is a careful addition of base spirit (same spirit used originally), done in small measured increments with tasting trials. For snap, a tiny acid addition (citric acid solution or fresh lemon, used cautiously) can brighten dramatically. For definition, a pinch of salt can “focus” flavors, and a short re-infusion with citrus peel, warming spice, or a few bitter botanicals can add edges back.

If the batch is far off, blending is your best friend: mix it with a stronger, drier, or more aromatic batch until it lands where you want. Then give it time — adjustments often taste disjointed for a few days; a short rest lets everything knit together again.