30-Minute Lemon Butter Baked Cod
By Beth Kaminski ·
Cod bakes quickly, making it a useful choice for a weeknight dinner. Here, lemon, garlic, and butter turn into a spoonable sauce right in the baking dish. Serve the fish with rice and green beans to catch every bit.
Why This Baked Cod Works
Cod has a mild flavor and thick flakes that pair well with lemon and garlic. Baking it in a shallow dish keeps the preparation hands-off, while melted butter coats the fish more evenly than cold pats of butter. A little olive oil helps the sauce stay fluid for spooning over rice, potatoes, or vegetables.
The most important detail is choosing fillets of similar thickness. Four pieces that are about 1 inch thick will cook more evenly than a mixture of thin tails and thick center cuts. If one end is very thin, tuck it underneath the fillet before baking.
Ingredient Tips and Substitutions
- Cod: Fresh or fully thawed frozen cod both work. Look for firm, moist fillets without excessive liquid in the package.
- Other fish: Haddock or pollock can replace cod. Thinner pieces will need less oven time, so check them early.
- Butter: Unsalted butter lets you control the seasoning. If using salted butter, reduce the added salt to 1/2 teaspoon.
- Lemon: Fresh juice and zest give the sauce a brighter flavor than bottled juice alone. Zest the lemon before cutting it.
- Parsley: Fresh dill or chives make good alternatives. Use about 1 tablespoon of either so they do not overwhelm the fish.
Make-Ahead and Storage
You can measure the seasonings, chop the parsley, and mince the garlic several hours ahead. Keep the garlic and parsley covered in the refrigerator. Wait until just before baking to add the lemon butter to the fish; a long soak in lemon juice changes its texture.
Refrigerate leftovers in a shallow, airtight container within 2 hours and use within 3 days. Reheat the fish with its sauce in a covered baking dish at 300°F until it reaches 165°F, checking after 10 minutes. Gentle heat and a spoonful of water help limit drying, though reheated cod will be firmer than freshly baked fish.
Frequently Asked Questions
Can I bake the cod straight from frozen?
For this 30-minute recipe, thaw it first. Frozen fillets release more water and take longer to cook, which dilutes the sauce. Thaw overnight in the refrigerator, or use a leakproof bag submerged in cold water and cook immediately after thawing.
How do I know when cod is done?
Use an instant-read thermometer inserted sideways into the thickest part. The fish is ready at 145°F. It should also look opaque and separate into large flakes when gently pressed with a fork.
Why is there extra liquid in my baking dish?
Cod naturally releases moisture, especially previously frozen fish. Patting it thoroughly dry helps. The finished sauce is meant to be thin and spoonable, not thick like gravy.
What should I serve with it?
Microwave rice, couscous, or crusty bread keeps dinner within the same short timeframe. Add steamed broccoli, green beans, or a bagged green salad for a complete meal.
Recipe
30-Minute Lemon Butter Baked Cod
By Beth Kaminski · American
- Prep
- 10 min
- Cook
- 20 min
- Total
- 30 min
- Serves
- 4
- Level
- Easy
Ingredients
- 4 cod fillets, about 6 ounces each and 1 inch thick, fully thawed if frozen
- 4 tbsp unsalted butter, cut into pieces
- 1 tbsp olive oil
- 2 tbsp fresh lemon juice
- 1 tsp finely grated lemon zest
- 3 clove garlic, finely minced
- ¾ tsp fine sea salt
- ¼ tsp ground black pepper
- ½ tsp sweet paprika
- 2 tbsp chopped fresh parsley
Method
- 1
Preheat the oven to 425°F with a rack in the center.
- 2
Melt the butter in a medium microwave-safe bowl in 15-second intervals, stirring between intervals, until just melted, about 30–45 seconds total.
- 3
Pat the cod thoroughly dry on all sides with paper towels.
- 4
Arrange the fillets in a 9-by-13-inch baking dish without overlapping, tucking any thin ends underneath; season evenly with the salt and pepper.
- 5
Whisk the olive oil, lemon juice, lemon zest, garlic, and paprika into the melted butter.
- 6
Pour the lemon butter mixture evenly over the cod, spooning some of the garlic onto each fillet.
- 7
Bake uncovered for 12–18 minutes, checking at 12 minutes, until an instant-read thermometer inserted sideways into the thickest part reads 145°F and the fish is opaque and flakes easily.
- 8
Finish with the parsley and spoon the warm pan sauce over the fillets before serving.
Spoon the lemon butter from the dish over each portion just before serving. Keep the sides straightforward so the fish can go from oven to table while it is still moist and flaky.
