This Seafood Gratin comes together in about 30 minutes and is made all in one pot for a easy weeknight meal that your family will love! Switch up the seafood, use what you have, or even turn it into a “clean out the fridge” feast, let’s face it, we all have those days when we’re running low on groceries!
What You’ll Need for This Seafood Gratin
- 200 g Shrimp
- 200 g Scallops
- 2 tablespoons Butter
- 1 medium Onion
- 2 cloves Garlic
- 200 ml Heavy Cream
- 50 ml White Grape Juice
- 50 g Grated Cheese
- 1/2 teaspoon Salt & 1/2 teaspoon Black Pepper
Let’s Get Cooking!
Instructions
Prep Your Ingredients: If you’re using frozen shrimp and scallops, make sure to thaw them completely. Rinse them under cold water, and pat dry with a paper towel. This helps to keep the texture nice and firm when cooking.
Sauté the Aromatics: In a large skillet, melt the butter over medium heat. Add the chopped onion and sauté for about 3-4 minutes until it’s translucent and fragrant.
Cook the Seafood: Toss in the shrimp and scallops and cook for about 3 minutes, or until the shrimp turns a beautiful pink color, and the scallops have turned opaque. You want to watch it because seafood can cook quickly!
Deglaze with Juice: Pour in the white grape juice and let it simmer for 2 minutes, scraping the yummy bits off the bottom of the pan to get all those flavor nuggets mixed in.
Make it Creamy: Stir in the heavy cream, salt, and black pepper until everything is mixed evenly. This is the step where the magic happens, you’ll love the smell that wafts up!
Transfer to Oven: Grab a baking dish and transfer the seafood mixture into it. Sprinkle the grated cheese generously over the top.
Bake to Perfection: Preheat your oven to 350°F (180°C), then pop the baking dish in the oven for about 15 minutes. Your gratin will be ready when the cheese is bubbly and golden brown!
Cool and Serve: Once it’s out of the oven (be careful, it will be hot!), let it cool slightly before diving in. It’s always the hardest part, but trust me, let your Seafood Gratin rest a couple of minutes before serving up those generous portions!

Why I Love This Seafood Gratin
This is my go-to recipe when I need something comforting but quick to prepare after a hectic day. With its creamy goodness and tons of flavor, it has become a family favorite. Honestly, I’m a real sucker for seafood, and this dish always impresses without requiring much effort! Best part? It’s incredibly versatile, so you can throw in whatever seafood you have on hand!
If you loved this Seafood Gratin, be sure to check out my Asian Chilli Garlic Prawns (Shrimp), my Moroccan Fish Tagine, or my Easy Seafood Risotto!
Why This Recipe Works
Quick & Easy
This Seafood Gratin literally comes together in under 30 minutes. I love meals that fit into that bustling weeknight schedule but still feel special!
One Pot Cooking
Less mess means more time spent with your family! Everything cooks in one skillet, the seafood, sauce, and veggies. Just pop it in the oven and let it work its magic!
Comfort Food at Its Best
Creamy and cheesy goodness that warms your belly? It doesn’t get any better than this! Every bite feels like a warm hug, and we could all use that now and then!
Customizable
You can switch up the ingredients based on what you have at home! Add in some veggies like spinach or bell peppers, or use different seafood. Maybe toss in some crab or even some fish. The possibilities are endless!
Budget-Friendly
Overall, this recipe uses affordable, everyday ingredients that are super easy to find. It’s a more economical way to enjoy delicious seafood!
Serving Suggestions
This gratin goes perfectly with a fresh salad, think Caesar or a classic green salad with a vinaigrette. You could also serve it alongside some crusty French bread, perfect for scooping up all that amazing sauce!
Storage Tips
Leftovers can be stored in an airtight container for up to 3 days in the refrigerator. It keeps surprisingly well!
Reheating Instructions
To reheat, pop it in the oven at 350°F (180°C) for about 10 minutes to warm through. You can also use the microwave, but be careful not to overcook it or the seafood may become rubbery.
Freezer Friendly?
You could freeze the unbaked Seafood Gratin, just make sure to wrap it well in plastic wrap and foil. Use it within 3 months, and thaw overnight in the fridge before baking!
Final Thoughts
Oh! One more thing. This Seafood Gratin is not only a hit with my family but also makes for a fantastic dish when hosting friends. Pair it with a crisp white wine, and you’ve got yourself a delicious, fancy meal without all the fuss!
So, there you have it! This quick Seafood Gratin should definitely make its way into your recipe rotation. It’s comforting, versatile, and a total crowd-pleaser that I know you and your family will love! Happy cooking! Follow us on Pinterest for daily meal inspiration!

Seafood Gratin
Ingredients
Method
- Thaw frozen shrimp and scallops completely. Rinse under cold water and pat dry with a paper towel.
- Chop the onion finely.
- In a large skillet, melt the butter over medium heat. Add the chopped onion and sauté for about 3-4 minutes until it’s translucent.
- Toss in the shrimp and scallops. Cook for about 3 minutes, or until the shrimp turn pink and the scallops are opaque.
- Pour in the white grape juice and let it simmer for 2 minutes, scraping the bottom of the pan.
- Stir in the heavy cream, salt, and black pepper until evenly mixed.
- Transfer the seafood mixture into a baking dish and sprinkle with grated cheese.
- Preheat your oven to 350°F (180°C) and bake for about 15 minutes, until the cheese is bubbly and golden brown.
- Let the gratin cool slightly before serving to enhance flavor.