Which spices turn bitter during infusion and how can you avoid it?

Expanded Explanation

Several spices and botanicals can become bitter when over-infused. Clove, cinnamon bark, star anise, wormwood, citrus pith, nutmeg, bay leaf, and some dried herbs are common examples. Bitterness is not always bad; in small amounts it gives structure, length, and a more adult finish to a liqueur.

The problem appears when bitter compounds dominate the aroma and sweetness cannot balance them. This often happens when strong spices are used in large quantities, crushed too finely, or left in alcohol for too long. High ABV alcohol can intensify this effect because it extracts deeper compounds more quickly.

To avoid harsh bitterness, use small doses, keep strong botanicals whole or lightly cracked, and taste often. Remove bitter ingredients early and continue the infusion with softer aromatics if needed. When working with powerful spices, micro-dosing is more reliable than trying to correct a heavy extraction later.