Cullen Skink Recipe

On a cold evening, few dinners are as satisfying as a pot of Cullen Skink: a Scottish soup made with smoked haddock, potatoes, onion, and milk. This version serves six generously and keeps the ingredient list simple, but the result is far from plain. The smoked haddock gives the broth a deep, gently salty savoriness, while butter-sweated onion and tender potatoes make it rich without requiring cream. It is the kind of recipe that tastes as though it has been simmering all afternoon, even though it comes together in about 45 minutes. The key to this particular Cullen Skink is cooking the fish gently rather than boiling it hard. Start by softening the diced onion in the butter until translucent, then add the potatoes and enough water to cover them. Once the potatoes are nearly tender, add the smoked haddock and milk and let everything simmer quietly for about 10 minutes. The fish will perfume the broth as it poaches, and some pieces will naturally flake into the soup while others remain in satisfying chunks. I like to mash a few of the potatoes against the side of the pot before serving; this thickens the soup slightly while leaving plenty of distinct potato and haddock pieces. Smoked haddock varies in saltiness, so taste only after the fish has cooked before adding any extra salt. If your haddock is particularly salty, you can soak it briefly in cold water and pat it dry, though many supermarket fillets are ready to use as they are. Keep the heat low once the milk goes in—vigorous boiling can make the milk look grainy and can toughen the fish. For the best texture, choose potatoes that become tender and creamy, such as Yukon Golds or another all-purpose variety, rather than very waxy potatoes. Serve Cullen Skink as a warming dinner with thick slices of crusty bread for dipping and perhaps a simple green salad dressed with lemon or cider vinegar to cut through the richness. A scattering of chopped parsley at the end adds freshness and a welcome contrast to the pale, smoky soup. It is especially good made just before serving, when the haddock is delicate and the potatoes still hold their shape, though leftovers reheat well over low heat. If the soup thickens overnight, loosen it with a splash of milk or water while warming it gently.