Carrickfergus Mussels in Buttermilk Broth
Fresh Antrim coast mussels steamed with leeks and cider, finished in a gentle, tangy buttermilk broth with scallions and flat-leaf parsley.

- Prep
- 20 min
- Cook
- 15 min
- Total
- 35 min
- Servings
- 4
- Difficulty
- Easy
- Calories
- 290 kcal
Equipment
- โขlarge lidded stockpot
- โขcolander
- โขstiff kitchen brush
- โขladle
- โขwide serving bowls
Nutrition
Per serving, approximate
- Calories
- 290 kcal
- fat
- 12 g
- carbs
- 9 g
- fibre
- 1 g
- protein
- 28 g
- calories
- 290 kcal
Instructions
- 1
Scrub mussels under cold running water, pulling away any stringy beards attached to the shell hinge.
- 2
Discard any cracked mussels or open ones that do not shut when sharply tapped on the worktop.
- 3
Melt butter in a large lidded pot over medium heat on the hob.
- 4
Add sliced leek and garlic, cooking gently for 4 minutes until soft and translucent.
- 5
Pour in dry cider and bring to a rapid boil for 1 minute to cook off alcohol.
- 6
Tip the cleaned mussels into the pot and cover immediately with the lid.
- 7
Steam over high heat for 3 to 4 minutes, shaking the pot occasionally until shells open.
- 8
Remove lid and discard any mussels that remain tightly closed after steaming.
- 9
Reduce hob heat to low and gently pour buttermilk into the hot cooking liquor.
- 10
Swirl pot gently for 30 seconds to warm the broth without letting it boil.
- 11
Stir through chopped parsley and sliced scallions, then season with cracked black pepper.
- 12
Ladle mussels and rich buttermilk broth into warm shallow bowls to serve.
Chef's tips
Bring the buttermilk to room temperature before adding it to prevent curdling. Keep the heat very low once buttermilk goes into the pot and never let the broth boil. Discard any mussel that does not open fully after four minutes of steaming.
Ingredient substitutions
- traditional buttermilk โ whole milk mixed with one tablespoon of lemon juice
- dry Irish cider โ dry white wine or light fish stock
Storage
Cooked mussels and broth are best eaten immediately and should not be stored.
Reheating
Reheating is not recommended as mussels turn tough and the buttermilk broth will separate.
Common mistakes to avoid
- โขBoiling the pot after adding buttermilk, which causes the dairy to split.
- โขFailing to discard open, dead mussels prior to cooking.
- โขLeaving mussels on high heat too long, making the delicate shellfish rubbery.
Serving suggestions
Cooked Carrickfergus Mussels in Buttermilk Broth?
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