The rustic Greek fishermen's soup: a mix of small whole fish (and often the heads and bones of larger ones) simmered with onion, potato, plenty of olive oil, and finished with lemon. There is no roux and no cream — the body comes from the fish, the starch of the potato, and the oil. Traditionally cooked on the boat from the catch that could not be sold, it is plain, deeply savoury, and built around freshness rather than seasoning. The lemon at the end lifts the whole pot.
Kakavia takes its name from the kakavi, the small cooking pot fishermen kept on their boats, and it is often described as the oldest of the Greek fish soups — a working meal made at sea from the day's small fry and trimmings that had no market value, cooked in seawater with whatever oil and onion were aboard. It is also commonly cited as an ancestor of the French bouillabaisse, a claim that rests on a real historical thread: Marseille was founded around 600 BC as Massalia, a colony of Greeks from Phocaea in Ionia, who would have carried their fishermen's-soup tradition west with them. The direct line from one specific soup to the other is more folklore than documented fact, so it is best taken as a shared Greek-Mediterranean lineage rather than strict parentage.
A clear, golden, oil-rich broth that tastes intensely of the sea, with a faint sweetness from softened onion and the lemon's brightness cutting through at the finish. Pieces of flaking white fish and tender potato that has half-dissolved to thicken the soup. It is rough by design — small bones, simple ingredients — and eaten with bread. The broth is the prize; many cooks strain part of the fish out, serve the broth first, and the fish after.
Body in kakavia comes from three places and no thickener: gelatin from fish heads, bones, and skin that dissolves into the broth; starch from potato that breaks down and clouds the liquid into a light suspension; and olive oil, added in quantity, which the gentle simmer partly emulsifies into the broth for richness. The fish go in by texture and timing — firmer fish and bones first to build the stock, delicate small fish only at the end so they do not disintegrate. The pot is barely stirred to keep the fish intact, and the lemon (or sometimes an avgolemono of egg and lemon) is added off the heat so the acid stays sharp and any egg does not curdle.
Variations
An avgolemono finish (whisking egg with lemon into the hot broth) gives a richer, slightly creamy version. Coastal and island cooks each favour their own mix of rockfish, scorpionfish, and small bream; some add tomato, though purists keep it tomato-free and oil-and-lemon only. Psarosoupa is the broader name for Greek fish soup and overlaps heavily with kakavia, the latter implying the rougher, boat-cooked original.
On the Palate
Where Kakavia sits in the Greek flavor cloud
Ingredients
Serves 4How it's made
6 steps · 30 min
- 125 min
Clean the fish; keep small ones whole and reserve heads and bones from any larger fish for the stock.
- 25 min
In a large pot, layer sliced onion and chunks of potato, pour in a generous amount of olive oil and enough water to cover, and bring to a simmer.
- 325 min
Add the heads, bones, and firmer fish first; simmer gently 20–25 minutes until the potato softens and the broth turns cloudy and rich.
Watch outSimmer the heads, bones and firm fish first until the potato clouds the broth — that starch and gelatin are the whole body of the soup, no thickener.
- 45 min
Lower in the small, delicate fish and simmer just until cooked through, a few minutes, without stirring hard.
Watch outSlip the small delicate fish in only at the end and don't stir hard — a few minutes is enough, or they break apart into the broth.
- 53 min
Season, take off the heat, and add plenty of lemon juice (or whisk in an avgolemono if using).
Watch outAdd the lemon off the heat — its brightness is the finishing note, and boiling it dulls the sharp fresh edge.
- 65 min
Rest briefly; serve the broth and fish with bread, broth first if you prefer.
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