Sous Vide Cod with Lemon Butter: A Simple Yet Elegant Dish

Sometimes the simplest dishes are the most impressive, and this sous vide cod with lemon butter is proof. Cod fillets are gently cooked in a temperature-controlled water bath, then finished with a buttery lemon sauce that seeps right into the fish. The result is tender, flaky cod that tastes like it came straight from a restaurant kitchen.

If you’re here just to get cooking, you’ll find a jump-to-recipe card below along with clear steps and serving ideas. But if you’d like a little extra guidance before diving in, keep reading, I’ll walk you through everything you need to know to make this dish smooth and stress-free.

Table of Contents

Why You’ll Love This Sous Vide Cod

• Perfectly cooked every time – sous vide keeps the temperature steady, so the cod turns out moist and flaky without any guesswork.
• Simple, elegant flavors – lemon and butter melt together inside the bag, gently infusing the fish with a fresh, bright taste.
• Works from fresh or frozen – no need to panic if you forgot to thaw; just adjust the cooking time.
• Effortless prep and cleanup – all the magic happens in one sealed bag, making this a stress-free recipe for any night of the week.

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Ingredients You’ll Need

• 2 cod fillets (about 4–6 ounces each, skinless, 1 to 1.5 inches thick)
• 2 tablespoons unsalted butter, divided into small pats
• 1 lemon, zested and juiced (about 1–2 tablespoons juice)
• 1 tablespoon capers, drained (optional, for garnish)
• 1–2 teaspoons fresh dill or parsley, finely chopped (optional, for garnish)
• 3/4 teaspoon kosher salt, divided between both fillets
• 1/2 teaspoon freshly ground black pepper, or to taste

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Step-by-Step Instructions

Step 1: Preheat the water bath

Fill a large pot or sous vide container with water and attach your immersion circulator. Set the temperature to 130°F (54°C) for tender, flaky cod. Allow the water to come fully up to temperature before adding the fish.

Step 2: Season the cod

Pat the cod fillets dry with paper towels to help the seasoning stick. Sprinkle both sides evenly with kosher salt and black pepper. This simple base seasoning allows the lemon and butter to shine.

Step 3: Prepare the bag

Place the seasoned fillets in a zip-top bag or vacuum-seal bag in a single layer. Add the butter pats, lemon zest, and a tablespoon of lemon juice around the fish (not directly on top) so the flavors can circulate evenly.

Step 4: Seal the bag

• If using a vacuum sealer: seal on the moist setting.
• If using a zip-top bag: use the water displacement method by slowly lowering the bag into the water to push out air, then seal just above the waterline.

Step 5: Cook the cod

Carefully lower the sealed bag into the preheated water bath. Clip or weigh down the bag if it floats. Cook for:

• 30 minutes if using fresh cod
• 45 minutes if starting from frozen

Step 6: Plate and finish

When the cooking time is up, carefully remove the bag with tongs. Open it and gently transfer the fillets to warmed plates, they’ll be delicate. Spoon the lemon-butter sauce from the bag over the fish. Garnish with fresh dill or parsley and capers, if using. Serve immediately while warm.

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Serving Suggestions

• With simple sides – Pair the cod with steamed asparagus, roasted fingerling potatoes, or buttery green beans. These light sides balance the delicate lemon-butter sauce beautifully.
• Over grains – Serve on a bed of herbed couscous, rice pilaf, or creamy mashed potatoes, letting the lemon-butter juices soak in for extra flavor.
• As a light main – Flake the cod gently over buttered toast or fold it into soft tacos with shredded cabbage and a squeeze of lemon for a casual twist.

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FAQs

Can I cook the cod straight from frozen?
Yes, you can. Just add about 15 extra minutes to the cooking time (45 minutes total). The fish will still come out perfectly tender and flaky.

What’s the best temperature for sous vide cod?
130°F (54°C) is the sweet spot. It gives you moist, flaky fish that holds together well.

Do I need a vacuum sealer?
Not at all. A simple zip-top bag with the water displacement method works perfectly for this recipe.

Should I sear the cod after sous vide?
It’s not necessary. Cod is delicate, and this recipe is meant to be served straight from the bag with its lemon-butter sauce.

How long will leftovers keep?
Cooked cod will stay fresh in the fridge for up to 3 days in an airtight container. Reheat gently in a pan with a splash of butter or in a low-temp water bath to avoid drying it out.

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Wrapping It Up

Sous vide cod with lemon butter is one of those recipes that feels fancy but couldn’t be easier. With just a few simple ingredients and the steady heat of a sous vide bath, you end up with cod that’s tender, flaky, and full of bright citrus flavor.

You may also like:
– How to Cook Cod With Chorizo
– Cod Fish Burrito Recipe
– Fried Cod and Rice Recipe
– Cod Air Fryer Recipe

It’s the kind of dish that works for a cozy weeknight dinner yet looks polished enough to serve to guests. Give it a try, and don’t forget to spoon every last drop of that buttery sauce over your plate.

If you have any questions, drop them in the comments, I’d love to help. Happy cooking!