Dark chocolate pairs best with wines that have the structural intensity to match its bitter cocoa and tannin character without being overwhelmed. Fortified wines are the strongest match: aged Tawny Port with its dried fig, rancio, and roasted nut character is the classic pairing. Banyuls from the Roussillon, a naturally sweet Grenache based wine, is the benchmark French equivalent. A full bodied, fruit forward red such as Zinfandel or Amarone can also work, where the ripe dark fruit and spice complement the chocolate.

Many wines use animal derived fining agents during production to clarify and stabilise the liquid before bottling. Common fining agents include isinglass (derived from fish swim bladders), gelatine (bovine or porcine), casein (milk protein), and egg whites (albumin). These are added to bind suspended particles and removed before bottling, but trace quantities may remain. Vegan wines use alternatives including bentonite clay, activated carbon, or pea protein. Checking the Barnivore database or looking for a vegan certification on the label is the most reliable approach.