For an extra layer of flavor, consider adding a sprinkle of smoked paprika to the mashed potatoes. Ensure the cod is cooked through but still moist – avoid overbaking. The internal temperature should reach 145°F (63°C). Fresh dill can be used as a substitute for tarragon, if desired. Serve immediately to enjoy the gratin at its best.
Creamy Cod and Potato Gratin
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PREP TIME20 mins
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COOK TIME55 mins
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TOTAL TIME1 hrs 20 mins
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SERVING2 People
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VIEWS157
Elevate your seafood experience with this elegant Creamy Cod and Potato Gratin. Flaky cod baked in a rich, lemony cream sauce, nestled atop a bed of smooth, buttery mashed potatoes. A sophisticated take on a classic comfort food.
Ingridients
Adjust Servings
Nutrition
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Carbohydrate44 g
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Cholesterol333 mg
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Fiber5 g
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Protein39 g
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Saturated Fat54 g
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Sodium217 mg
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Sugar2 g
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Fat86 g
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Unsaturated Fat0 g
Follow The Directions
01
Step
5 mins
Preheat the oven to 450 degrees F (230 degrees C). Grease 2 individual-sized oven-safe dishes with 1 tablespoon of butter and place them on a baking sheet. (5 minutes)
02
Step
20 mins
Place potatoes in a large pot of well-salted water and bring to a boil over high heat. Reduce heat and simmer gently until tender. (20 minutes)
03
Step
2 mins
While potatoes simmer, trim, bone, and cut the cod fillets across into 2-inch pieces. (5 minutes)
04
Step
3 mins
Drain potatoes well and return to the pot. Add a pinch of cayenne, salt, and 4 tablespoons butter. Mash until smooth. (5 minutes)
05
Step
2 mins
Transfer about 2/3 cup of the mashed potatoes into each of the prepared dishes. Smooth out evenly and make a shallow depression with a spoon down the middle. Set aside. (5 minutes)
06
Step
4 mins
Heat remaining 2 tablespoons butter in a deep 10-inch skillet over medium-high heat. Cook the shallots in the hot butter with a pinch of salt until they just start to turn golden. (4 minutes)
07
Step
3 mins
Add cream, lemon zest, and a pinch of cayenne, and bring to a simmer. Add cod and wait for the sauce to come back to a simmer. Cook for 1 minute, while basting with the sauce; turn and cook for 1 minute more. (5 minutes)
08
Step
1 mins
Pour in lemon juice and turn off the heat; stir for about 30 seconds. (1 minute)
09
Step
2 mins
Divide the pieces of cod over the potato. Add enough sauce to just cover the fish and return the pan to the stove. (3 minutes)
10
Step
2 mins
Bring sauce to a boil over medium-high heat and cook until the sauce reduces and thickens. (2 minutes)
11
Step
1 mins
Turn off the heat and stir in tarragon. (1 minute)
12
Step
10 mins
Spoon the thickened sauce over the cod. Add a light dusting of Parmigiano-Reggiano cheese. (2 minutes)
13
StepBake in the center of the preheated oven until cod is cooked through and the sauce is browned and bubbling. (15 minutes)
14
StepLet rest for 5 minutes before serving. (5 minutes)
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Dorian Reynolds
Jun 16, 2025I added a little bit of white wine to the sauce and it was delicious.
Madaline Hermiston
Jun 4, 2025This is definitely going into my regular rotation.
Maymie Maggioharber
Apr 7, 2025The gratin is so creamy and the cod is perfectly cooked.
Colton Farrell
Mar 16, 2025I made this for a dinner party and everyone raved about it!
Abbie Donnelly
Nov 26, 2024Easy to follow recipe with great results.
Adah Bashirian
Apr 4, 2024This recipe is amazing! The lemon and tarragon really brighten up the dish.