Instant Pot mussels with garlic and thyme bring restaurant-quality steamed mussels to your table in just 20 minutes. The mussels steam over a fragrant, buttery broth built from garlic, thyme, lemon, and fish stock, then get a shower of Parmesan. It's a fast, elegant low-carb dinner that feels like a night out.
There’s something incredibly elegant about a steaming bowl of mussels, and you won’t believe how simple it is to create this restaurant-quality dish at home. Forget complicated techniques; your Instant Pot is the key to unlocking perfectly tender mussels bathed in a fragrant, buttery broth infused with garlic, thyme, and a hint of lemon. In just 20 minutes, you can have a stunning appetizer or a light, sophisticated main course ready to impress. Let’s dive in!
Ingredients
• 1 lb / 450g mussels, cleaned and debearded
• 2 cups / 475ml fish stock
• 5 garlic cloves, crushed
• 3 tbsp / 45g (1.59 oz) butter
• 2 tbsp / 30ml fresh lemon juice
• 1 tsp dried thyme
• ½ tsp chili flakes
• 2 tbsp (30 ml) fresh parsley, finely chopped
• ¼ cup / 25g (0.88 oz) grated Parmesan cheese, for serving
Instructions
1. Directions
2. Prepare the Mussels: Thoroughly rinse the mussels under cold running water. Scrub the shells to remove any grit and pull off the fibrous “beard” from each one. Discard any mussels that are open and don’t close when tapped. Set aside.2. Sauté the Aromatics: Set your Instant Pot to the “Sauté” function. Add the butter and let it melt, then add the crushed garlic and sauté for 1-2 minutes until fragrant, being careful not to burn it.3. Build the Broth: Pour in the fish stock and lemon juice, scraping up any flavorful bits from the bottom of the pot. Stir in the dried thyme, chili flakes, and fresh parsley.4. Steam the Mussels: Place the cleaned mussels into a steamer basket and lower it into the Instant Pot. Secure the lid and turn the steam release handle to the “Sealing” position.5. Pressure Cook: Select the “Manual” or “Pressure Cook” button and set the timer to 5 minutes on high pressure.6. Release and Serve: Once the timer finishes, perform a quick release by carefully turning the steam release handle to “Venting.” Once the pin drops, open the lid. Discard any mussels that have not opened. Carefully lift the steamer basket out, ladle the mussels into serving bowls, pour the delicious broth over them, and sprinkle with grated Parmesan cheese. Serve immediately.
Nutritional Information
• Per Serving
• Calories: 207
• Total Fat: 17.1g
• Net Carbs: 5.6g (0.2 oz)
• Protein: 17.1g
• Fiber: 0.1g
Pro Tips
• Before cooking, tap any open mussels on the counter. If they don’t close within a minute, they are not fresh and should be discarded.
• Don’t skip the crusty bread! It’s essential for sopping up every last drop of the incredible garlic-butter broth.
• For a classic flavor, substitute 1 cup (240 ml) of the fish stock with 1 cup (240 ml) of dry white wine like Sauvignon Blanc. Add it after the garlic and let it simmer for a minute before adding the stock.
• No Instant Pot? Make this on the stovetop in a large pot with a tight-fitting lid. Bring the broth to a simmer, add the mussels, cover, and steam for 5-7 minutes, until they have opened.
FAQ
Q: How do I know if my mussels are safe to eat
A: Before cooking, tap any open mussels on a hard surface. If they don’t close within a minute, they are not fresh and should be discarded. After cooking, you must discard any mussels that have not opened.
Q: Can I make this recipe without an Instant Pot
A: Yes, you can easily make this on the stovetop. Prepare the broth in a large pot with a tight-fitting lid. Bring it to a simmer, add the cleaned mussels, cover, and steam for 5-7 minutes, or until the mussels have opened.
Q: Can I use white wine in this recipe
A: Absolutely. For a classic flavor, substitute 1 cup (240 ml) of the fish stock with 1 cup (240 ml) of a dry white wine like Sauvignon Blanc. Add the wine after sautéing the garlic and let it simmer for a minute to cook off the alcohol before adding the remaining stock.
Q: What should I serve with these Instant Pot mussels
A: These mussels are best served with crusty bread to soak up the delicious garlic butter broth. They can also be served over pasta or with a side of french fries for a complete meal.
Pro Tips
- Tap any open mussels on the counter before cooking — if they don't close within a minute, they're not fresh and should go in the bin.
- Sauté the crushed garlic in butter just 1-2 minutes until fragrant; burnt garlic turns the whole broth bitter.
- For a classic flavor, swap 1 cup of the fish stock for 1 cup of dry white wine like Sauvignon Blanc — add it after the garlic and let it simmer a minute before the stock.
- Steam the mussels in a steamer basket so you can lift them out cleanly and ladle the broth over the top.
- No Instant Pot? Steam them on the stovetop in a large pot with a tight-fitting lid, simmering the broth and cooking the mussels 5-7 minutes until they open.
Frequently Asked Questions
Are steamed mussels keto-friendly?
Very much so — each serving has about 5.6g carbs, 17.1g protein, and 17.1g fat. The broth is built from butter, garlic, lemon, and fish stock, so it stays low-carb.
How do I know which mussels to discard?
Before cooking, discard any that stay open when tapped. After cooking, throw away any that haven't opened — they weren't safe to eat.
Can I make these mussels ahead of time?
Mussels are at their best straight from the pot, so cook them just before serving. If you have leftovers, store them shelled in their broth and eat within a day, reheating only briefly so they don't go rubbery.
Can I use white wine instead of fish stock?
Yes — replacing 1 cup of the fish stock with a dry white wine like Sauvignon Blanc gives the broth a classic bistro depth. Add it right after the garlic and let it simmer for a minute before the rest of the stock.
Recipe card below.
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Instant Pot Mussels with Garlic and Thyme
Ingredients
Method
- Directions
- Prepare the Mussels: Thoroughly rinse the mussels under cold running water. Scrub the shells to remove any grit and pull off the fibrous beard from each one.
- Discard any mussels that are open and don't close when tapped.
- Set aside. 2.
- Sauté the Aromatics: Set your Instant Pot to the Sauté function.
- Add the butter and let it melt, then add the crushed garlic and sauté for 1-2 minutes until fragrant, being careful not to burn it. 3. Build the Broth: Pour in the fish stock and lemon juice, scraping up any flavorful bits from the bottom of the pot.
- Stir in the dried thyme, chili flakes, and fresh parsley. 4. Steam the Mussels: Place the cleaned mussels into a steamer basket and lower it into the Instant Pot. Secure the lid and turn the steam release handle to the Sealing position. 5. Pressure Cook: Select the Manual or Pressure Cook button and set the timer to 5 minutes on high pressure. 6. Release and Serve: Once the timer finishes, perform a quick release by carefully turning the steam release handle to Venting.
- Once the pin drops, open the lid.
- Discard any mussels that have not opened. Carefully lift the steamer basket out, ladle the mussels into serving bowls, pour the delicious broth over them, and sprinkle with grated Parmesan cheese.
- Serve immediately.
- Before cooking, tap any open mussels on the counter. If they don't close within a minute, they are not fresh and should be discarded.
- Don't skip the crusty bread! It's essential for sopping up every last drop of the incredible garlic-butter broth.
