Chilean sea bass is a rich, flaky white fish that cooks quickly in a hot skillet; this version is seared with olive oil, then finished with butter, garlic, lemon, and parsley. The short cook time suits evenly cut fillets, while a simple thermometer check helps keep the center tender and safely cooked.
Ingredients
- 4 Chilean sea bass fillets, about 6 oz (170 g) each and approximately 1 inch (2.5 cm) thick, skin-on or skinless
- 3/4 tsp fine salt (4 g)
- 1/4 tsp freshly ground black pepper (0.5 g)
- 1 tbsp olive oil (15 ml)
- 2 tbsp unsalted butter (28 g)
- 2 garlic cloves, finely minced (about 6 g)
- 1 tsp finely grated lemon zest (about 2 g)
- 1 tbsp fresh lemon juice (15 ml)
- 2 tbsp chopped fresh parsley (about 8 g)
Instructions
- Prepare the fillets. If the fish is frozen, thaw it completely in the refrigerator before starting; this quick timing assumes thawed fillets. Pat each fillet very dry on all sides with paper towels. Drying matters because excess moisture makes the fish steam instead of brown. Season both sides evenly with the salt and pepper. If the fillets have skin, check for any remaining scales and remove them before cooking.
- Heat the skillet. Set a large heavy skillet, preferably stainless steel or cast iron, over medium-high heat. Let it heat for about 1–2 minutes, then add the olive oil and swirl to coat the base. The oil should look fluid and shimmer, but it should not smoke heavily. Use a pan large enough to leave space between the pieces; if they crowd, cook in two batches and allow extra time.
- Sear the first side. Lay the fillets in the pan carefully, lowering them away from you to reduce splatter. If using skin-on fish, place it skin-side down first. Press each fillet gently with a spatula for about 10 seconds so the surface makes even contact, then leave it alone for about 4 minutes. Avoid moving or repeatedly lifting the fish while a crust forms.
- Turn and finish cooking. Slide a thin fish spatula under each fillet and turn it gently. Cook the second side for 3–4 minutes, depending on thickness. Add the butter and minced garlic during the final minute; tilt the pan and spoon the foaming butter over the fish, taking care not to let the garlic turn dark brown. The USDA FSIS safe minimum internal temperature for fish is 145°F (63°C); check the thickest part with a food thermometer and cook until it reaches that temperature. If a fillet needs more time, turn the heat down slightly and continue cooking in short intervals.
- Add the lemon and herbs. Move the pan off the heat once the fish reaches 145°F (63°C). Stir the lemon zest, lemon juice, and parsley into the buttery pan juices, then spoon the sauce over the fillets. Serve promptly while the edges are crisp and the center is moist. There is no separate resting period in this recipe.
Tips
- Start with dry, evenly sized fish. Choose fillets close to 1 inch thick so they finish at roughly the same time. If one piece is notably thinner, check it earlier and remove it from the pan as soon as it reaches 145°F (63°C). Do not rinse the fish under the tap; patting it dry is enough and avoids spreading raw seafood juices around the sink.
- Use a properly heated pan. Fish is more likely to stick if it goes into a cool skillet or is disturbed before the seared surface releases. Give the pan time to heat, add oil, and let the first side cook undisturbed. If the fillet resists when you try to turn it, give it another 20–30 seconds rather than pulling hard and breaking it.
- Choose a sensible substitute if needed. Chilean sea bass is sold as Patagonian toothfish and may be labeled differently depending on the market. If unavailable, use thick cod, halibut, or another firm white fish with a similar thickness; leaner fish may need a little less time and will not taste as buttery or rich. Pollock or thin tilapia can work, but they are more delicate and are easier to overcook.
- Adjust the seasoning at the end. Salt levels vary, and butter can be salted or unsalted. This recipe uses unsalted butter so the fish can be seasoned deliberately. Taste a little of the pan sauce before spooning it over dinner; add a pinch of salt or a few drops of lemon juice only if it needs it.
Serving Suggestions
Serve the fillets straight from the pan with the lemon-garlic butter spooned over the top. The sauce is flavorful but light enough to pair with plain sides that catch it: steamed rice, couscous, boiled baby potatoes, or crusty bread. For vegetables, try asparagus, green beans, sautéed spinach, or a crisp salad with a simple vinaigrette. If dinner needs a more filling side, roasted potatoes or a small portion of buttered orzo also work well.
For a balanced plate, add one vegetable and one starch rather than piling on several rich sides; the fish itself has a naturally buttery texture. Put lemon wedges on the table for anyone who likes a sharper finish, and add the parsley just before serving so it stays bright. Because the fillets are delicate, transfer them with a broad spatula and serve them whole rather than cutting them up in the pan.
Variations
Herb and caper finish: Stir 1 tbsp drained capers (about 9 g) and 1 tbsp chopped dill (about 3 g) into the lemon-butter sauce in place of the parsley. Capers add a briny, salty note, so taste before adding extra salt. This combination works especially well with potatoes or simply cooked green vegetables.
Lightly spicy: Add 1/4 tsp red pepper flakes (about 0.5 g) to the butter during its final minute in the pan. The flakes perfume the sauce without changing the quick cooking method. For a gentler citrus variation, replace the lemon juice with 1 tbsp lime juice (15 ml); lime makes the finish a little more tart and aromatic.
Olive and tomato pan sauce: After taking the fish out of the pan, stir 2 tbsp chopped pitted olives (about 18 g) and 1/4 cup halved cherry tomatoes (about 38 g) into the remaining butter. Cook them for 1–2 minutes until the tomatoes begin to soften, then spoon the mixture over the fish. This option adds a savory, Mediterranean-style accent; allow for the extra finishing time.
Storage and Reheating
For food safety, refrigerate cooked fish within 2 hours of cooking, sooner if the room is very warm. Store it in a covered, shallow container and use it within 3–4 days. Keep the fish separate from any sides that may become soggy, and refrigerate leftover sauce with it or in a small sealed container. Do not leave cooked seafood at room temperature while serving for an extended period.
Reheat only the portion you plan to eat. Warm it gently in a covered skillet over low heat with a teaspoon of water or butter, turning once if it is sturdy enough; stop as soon as it is hot throughout to limit drying. Leftovers should reach 165°F (74°C) when reheated, checked with a food thermometer. A microwave can also be used: cover loosely, heat in short bursts at medium power, and check the center between bursts. The fish may be less crisp after chilling and reheating, so leftover fillets are also good flaked into a warm grain bowl or salad after reheating.
Frequently Asked Questions
Is Chilean sea bass actually from Chile?
Despite the familiar market name, Chilean sea bass is Patagonian toothfish, a species found in cold Southern Ocean waters. The name became common in seafood markets, but it does not mean every fillet comes from Chile. Check the package or ask the fishmonger about the product’s origin and handling.
How can I tell when the fish is done?
The most reliable check is a food thermometer inserted into the thickest part of a fillet; it should read 145°F (63°C), the USDA FSIS safe minimum for fish. The flesh will also look opaque and separate into flakes when gently pressed, but appearance alone is less precise, particularly with a thick piece.
Can I use frozen Chilean sea bass?
Yes, but thaw it fully in the refrigerator before cooking for the stated timing and more even browning. Pat it very dry after thawing. Cooking a frozen fillet directly in the skillet takes longer and can leave the outside overcooked before the center is ready, so it is not the best fit for this 10-minute method.
Can I make this recipe without butter?
Yes. Use another tablespoon of olive oil (15 ml) and finish with the lemon, garlic, and parsley. The result will be less creamy and rich, but the fish will still sear well. Add garlic only near the end, since it can burn if left in hot oil for the entire cooking time.
Can I cook more than four fillets at once?
Only if they fit in a single layer with room between them. Overcrowding lowers the skillet temperature and encourages steaming, which prevents a good sear. Cook in batches if needed, keeping the first batch loosely covered in a warm place while the next cooks; check every piece for 145°F (63°C) before serving.
What if my fillets are thicker than 1 inch?
They will need more time than the recipe’s 10-minute cook window. After searing both sides, lower the heat and continue cooking, checking the thickest part with a thermometer until it reaches 145°F (63°C). For very thick pieces, a brief finish in a preheated oven can help cook the center evenly, but allow extra time and check the temperature rather than relying on the clock.
Related
- Chilean Sea Bass Recipe with Lemon Caper Butter Sauce
- Traditional Chilean Empanada Recipe: Empanadas de Pino
- Chilean Cuisine Recipes: Pastel de Choclo
More recipes to cook
Safety notes: safe minimum internal temperatures from USDA FSIS; raw and undercooked fish guidance from the U.S. FDA. Food safety notes
Spotted an error? Tell us and we will correct it (corrections policy).