Crispy popcorn mussels and mussel gratin

Crispy popcorn mussels and mussel gratin turn one ingredient into a lively seafood feast. Golden fried mussels bring crunch and heat, while garlic butter mussels bubble under Parmesan breadcrumbs. Add chive dip, lemon wedges and hot sauce butter, then serve everything straight away for maximum contrast.

By Matt Tebbutt
From Saturday Kitchen Recipes

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This crispy popcorn mussels and mussel gratin recipe calculates as Nutri-Score C. Mussels are an outstanding source of lean protein, iron, zinc and omega-3 fatty acids, making them one of the most nutritious shellfish choices available. The butter, breadcrumbs and frying oil add saturated fat and energy, which balances the otherwise excellent nutritional profile of this mussel dish.

Approximate nutrition per serving, based on 4 servings: 620 kcal, 38g fat, 19g saturates, 28g carbohydrates, 3g sugars, 2g fibre, 32g protein, 2.1g salt.

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Method

1. Mix the coating for the popcorn mussels – 5 minutes, and do this first.
   Combine the cornflour, plain flour, smoked paprika, onion powder, garlic powder, a good pinch of salt and some black pepper in a bowl. Give it a good stir so all the spices are evenly mixed through the flour. This spiced coating is what gives the crispy popcorn mussels their irresistible golden crunch.
2. Coat the mussels and shake off the excess – 5 minutes.
   Toss the mussels in the seasoned flour until every one is well coated. Tip them into a colander and give it a gentle shake to knock off any loose excess. This step helps the coating fry up evenly rather than clumping.
3. Heat the oil safely – 5 minutes.
   Heat a deep fat fryer to 180C, or carefully heat a deep pan of oil on the hob. Caution: hot oil can be dangerous. Never leave it unattended and keep a lid nearby. The oil needs to be at the right temperature so the mussels fry quickly and crisply rather than absorbing excess oil.
4. Fry the popcorn mussels until golden – 2 minutes per batch.
   Lower the coated mussels into the hot oil in batches and fry for around 2 minutes until they are crisp and golden. Remove them with a slotted spoon and drain on a plate lined with kitchen paper. Keep them warm while you fry any remaining batches.
5. Make the chive dip – 3 minutes, easy to do ahead.
   In a small bowl, mix together the soured cream, mayonnaise, a splash of cider vinegar and the finely chopped chives. Taste and adjust the vinegar to your liking. Cover and refrigerate until you are ready to serve the crispy mussels.
6. Make the hot sauce butter – 5 minutes, can overlap with frying.
   Melt the butter in a small saucepan over a medium heat and stir in the hot sauce. Add cider vinegar and Worcestershire sauce a little at a time, tasting as you go, until the balance of heat, tang and richness feels just right to you.
7. Serve the popcorn mussels – 2 minutes.
   Spread the chive dip generously over the base of a serving plate. Pile the crispy popcorn mussels on top, then drizzle over the hot sauce butter. Add lemon wedges alongside for squeezing over.
8. Reduce the mussel liquor for the gratin – 10 to 15 minutes, start this while frying the popcorn mussels.
   Pour the reserved mussel cooking liquor into a saucepan over a medium heat. Let it reduce by three-quarters until it becomes concentrated and intensely flavoured. This reduction is the secret to a deeply savoury mussel gratin.
9. Preheat the grill and prepare the gratin toppings – 5 minutes.
   Turn the grill to its highest setting so it is properly hot when you need it. In a bowl, mix together the butter, finely chopped garlic, tarragon and parsley until well combined. In a separate bowl, stir together the dried breadcrumbs and grated Parmesan cheese.
10. Warm the mussels in garlic herb butter – 3 to 4 minutes.
    Add the garlic and herb butter to a pan with the mussels and the reduced mussel liquor. Warm everything gently over a low heat, stirring occasionally, until the mussels are heated through and coated in that fragrant buttery sauce.
11. Fill the shells and add the gratin topping – 5 minutes.
    Spoon the warm buttery mussels back into their reserved shells, nestling a few inside each one. Arrange them on a grill pan or baking tray, then scatter the Parmesan breadcrumb mixture generously over the top of each shell.
12. Grill until bubbling and golden – 30 seconds to 1 minute, watch carefully.
    Slide the mussels under the hot grill and cook for just 30 seconds to 1 minute until the breadcrumb topping is golden, bubbling and fragrant. Keep a close eye on them as they can catch very quickly at this temperature. Serve the mussel gratin immediately while the crust is at its crispiest.

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Wine Pairing

Crispy popcorn mussels and mussel gratin call for wines with enough acidity and freshness to cut through the butter and the richness of the Parmesan breadcrumb crust. A chilled Muscadet Sèvre et Maine sur Lie is the classic choice for a mussel dish; its briny, mineral quality mirrors the natural saltiness of the shellfish beautifully.

For the popcorn mussels with hot sauce butter, try a dry, zesty Picpoul de Pinet or a crisp Sauvignon Blanc. Both wines have the lively acidity and citrus freshness to stand up to the spice and tang of this fried mussel recipe. If you prefer something with a little more body, a lightly oaked Chardonnay works well alongside the mussel gratin, complementing the garlic herb butter and Parmesan topping without overwhelming the delicate mussel flavour. For a sparkling option, a dry Crémant or Champagne makes a celebratory match for this seafood feast.

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FAQs

• Can I use pre-cooked mussels for crispy popcorn mussels? Yes. Vacuum-packed, ready-cooked mussels work well here. If using fresh mussels, steam them open first and reserve the cooking liquor for the gratin.
• How do I know when the frying oil is hot enough? Use a kitchen thermometer to check for 180C, or drop a small piece of bread into the oil; it should turn golden in about 30 seconds.
• Can I make the mussel gratin ahead? You can prepare the garlic herb butter, reduce the mussel liquor and mix the breadcrumbs ahead. Fill the shells and grill just before serving for the best result.
• What hot sauce works best in the hot sauce butter? Frank’s RedHot, Tabasco or sriracha all work well. Choose according to your preferred heat level.
• Can I bake the mussel gratin instead of grilling? Yes, bake at 220C/200C Fan/Gas 7 for 5 to 8 minutes until the topping is golden and bubbling, though grilling gives a faster, crispier finish.

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Tips

• Always steam fresh mussels open before removing them from their shells and reserve every drop of the cooking liquor for the gratin reduction.
• Fry the popcorn mussels in small batches to keep the oil temperature consistent and the coating crispy.
• Serve both dishes together for the full seafood feast experience; the popcorn mussels go fast, so have the gratin ready to follow straight after.