Irresistible Creamy Low-Carb Seafood Bake with Shrimp

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Creamy, bubbling, and blanketed in golden Parmesan, this seafood bake turns plump shrimp and tender scallops into something deeply comforting without a single noodle in sight. Earthy mushrooms and wilted spinach melt into a velvety cream cheese sauce (garlicky, lemony, and just rich enough), then everything gets finished in the oven while the kitchen smells incredible. Spoon it over cauliflower rice or pair it with a crisp green salad, and fast food suddenly feels very far away.

Why Make This Creamy Low-Carb Seafood Bake?

Because it delivers restaurant-style comfort in about 40 minutes (15 prep, 25 bake) with only a skillet and a baking dish . This Creamy Low-Carb Seafood Bake with Shrimp feeds six and tastes far more indulgent than its easy method suggests. Sautéing the mushrooms until golden and wilting the spinach completely before it joins the sauce builds deep flavor and keeps the bake from turning watery. Softened cream cheese melts smoothly into the heavy cream, and a squeeze of lemon at the end cuts through the richness. Large shrimp and sea scallops (or firm white fish) stay tender because they only need a short stint in the oven , and patting them dry first helps keep the sauce silky. Spoon it over cauliflower rice or serve it with a crisp green salad for a satisfying meal that makes takeout feel unnecessary. Leftovers keep well in the fridge for up to 3 days.

Ingredient Notes

Great seafood bakes start with good ingredients, and each one here plays a clear role, from the tender seafood to the silky sauce. Here’s what to look for and how to get the best results from your Creamy Low-Carb Seafood Bake with Shrimp, Scallops or Fish, Spinach and Mushrooms.

The Seafood

• Large shrimp : Shrimp add sweet, briny flavor and a satisfying snap. Look for raw, peeled, and deveined shrimp labeled 16-20 or 21-25 count, and pat them very dry so they don’t thin out the sauce.
• Sea scallops or firm white fish : Scallops bring buttery sweetness, while fish like cod, halibut, or haddock gives you tender, flaky bites. Choose “dry-packed” scallops when possible, since they’re free of added water, and pull off the small side muscle before cutting them into 1½-inch pieces.

Vegetables and Aromatics

• Butter : Butter gives the mushrooms a rich, nutty base for browning. Unsalted is best because it lets you control the salt, especially with Parmesan in the mix.
• Mushrooms : Mushrooms add earthy depth and a meaty bite. Cremini are ideal for their flavor, and cooking them until their liquid evaporates and they turn golden prevents a watery bake.
• Garlic cloves : Fresh garlic gives the sauce its signature savory aroma. Stir it into the skillet just long enough to turn fragrant (about 30 seconds), because browned garlic turns bitter.
• Fresh spinach : Spinach adds color, a mild mineral note, and a boost of nutrition. Wilt it fully and press out any extra moisture; frozen works too, so use about one-third of a 10-oz package, thawed and squeezed very dry.

The Creamy Base and Cheeses

• Heavy cream : This is the backbone of the sauce, giving it body and a luxurious, velvety texture. Stick with full-fat heavy cream (about 36% fat), since milk or half-and-half can thin out or separate in the oven .
• Cream cheese : Cream cheese makes the sauce thick, tangy, and extra smooth. Use full-fat block-style cream cheese and soften it fully so it melts evenly without lumps.
• Grated Parmesan cheese : Parmesan adds salty, nutty umami and helps the top turn golden. Grate it fresh from a wedge, because pre-grated versions often contain anti-caking agents that don’t melt as smoothly.
• Shredded mozzarella cheese : Mozzarella delivers that stretchy, bubbly finish. Choose low-moisture mozzarella and shred it yourself from a block for the best melt, and skip fresh mozzarella, which releases too much water.

Seasonings and Finishers

• Italian seasoning : This blend of dried herbs adds a cozy, savory backdrop that pairs naturally with seafood and cream. Rub it between your fingers as you add it to wake up the oils, and replace the jar if it’s been open for more than a year.
• Paprika : Paprika adds gentle warmth and a soft blush of color. Sweet paprika keeps things mellow, while smoked paprika gives a deeper, almost grilled flavor.
• Salt : Salt sharpens every flavor in the dish. Start with the listed amount and adjust at the end, since Parmesan and seafood both bring their own saltiness.
• Black pepper : Pepper adds subtle heat that balances the richness of the cream. Freshly ground has more aroma and bite than the pre-ground kind.
• Lemon juice : A little acidity brightens the sauce and keeps the dish from feeling heavy. Squeeze it fresh, as bottled juice can taste flat or slightly bitter.
• Fresh parsley : Parsley adds a clean, grassy freshness and a pop of color on top. Flat-leaf (Italian) parsley has the best flavor, and chives or fresh basil make a good substitute.

Step-by-Step Instructions

• Heat the oven to 400°F (200°C) and lightly grease a 9×13-inch baking dish . Pat the shrimp and scallops (or fish) very dry with paper towels so they don’t water down the sauce, then set them aside.
• Melt the butter in a large skillet over medium-high heat, then add the sliced mushrooms in a single layer. Sauté for 6 to 8 minutes, stirring occasionally, until their liquid has evaporated and they turn golden brown.
• Stir in the minced garlic and cook for about 30 seconds, just until fragrant. I like to pull the pan off the heat the moment I smell it, since browned garlic turns bitter.
• Add the spinach by the handful and toss for 1 to 2 minutes until fully wilted, then tilt the skillet and spoon off any pooled liquid.
• Reduce the heat to medium-low, then whisk in the heavy cream and softened cream cheese. Add the Italian seasoning, paprika, salt, and pepper and stir for 2 to 3 minutes, until the sauce is smooth and coats the back of a spoon, then remove from the heat and stir in the lemon juice.
• Fold the shrimp and scallops into the sauce, then pour everything into the baking dish and spread it evenly so the seafood is nestled in the sauce. Sprinkle the Parmesan and mozzarella over the top.
• Bake for 18 to 20 minutes, until the edges bubble, the cheese is golden, and the shrimp are pink and opaque. I usually slice into one scallop to check that it’s opaque all the way through, and if the top needs more color, I broil it for 1 to 2 minutes while watching closely.
• Let the bake rest for 5 minutes, then scatter the chopped parsley over the top. The sauce may look a little loose straight from the oven , but it thickens as it rests, so serve it over cauliflower rice or with a crisp green salad.

Tip: Pull the dish from the oven as soon as the shrimp turn pink and curl into a loose “C.” A tight “O” shape means they’ve gone a touch too far, and the residual heat will keep cooking them.

Reminder: Store leftovers in an airtight container in the refrigerator for up to 3 days, and reheat gently at 50% power in the microwave or in a 325°F oven so the seafood stays tender.

Storage & Freezing

• Refrigerator (up to 3 days): Let the bake cool for no more than 30 minutes, then move leftovers into a shallow airtight container so they chill quickly and evenly. Seafood is the first thing to go downhill, so refrigerate within 2 hours of baking. Expect the sauce in this Creamy Low-Carb Seafood Bake with Shrimp, Scallops or Fish, Spinach and Mushrooms to firm up as the cream cheese and Parmesan set. That’s normal, and it loosens as it warms.
• Freezer (up to 2 months): Freezing works, but with trade-offs. Cooked shrimp and scallops can turn slightly firmer, and the sauce may look grainy or separated after thawing. The mushrooms and spinach also release a little water. I get better results by freezing only the sauce base (mushrooms, spinach, cream, and cream cheese) in portions, then folding in fresh, dry seafood and baking when I’m ready. If you freeze the finished bake, use freezer-safe containers with a little headspace and thaw overnight in the refrigerator , never on the counter. Firm white fish holds up better than scallops.
• Reheating: Cover the dish with foil and warm it in a 325°F oven for 15 to 20 minutes, or microwave single portions at 50% power in short bursts, stirring in between. Slow, gentle heat keeps the seafood tender and stops the sauce from breaking. If it looks thick or slightly separated, whisk in a splash of heavy cream or broth until it turns glossy again. Leftovers should reach 165°F in the center. I finish each portion with a squeeze of fresh lemon and a pinch of parsley to wake the flavors back up.

Make Ahead Options

This Creamy Low-Carb Seafood Bake with Shrimp is perfect for meal prep on busy weeknights! You can sauté the mushrooms, garlic, and spinach, then whisk in the cream, cream cheese, and seasonings up to 24 hours in advance. Cool the sauce, cover it, and refrigerate it (stir in the lemon juice just before baking to keep its flavor bright). Shred the cheeses and pat the seafood dry ahead too, but keep the seafood chilled separately until before serving so it stays tender. When ready to bake, gently rewarm the sauce, fold in the seafood, top with cheese, and bake 18 to 20 minutes for a just-as-delicious dinner.

Expert Tips

A few small habits make this Creamy Low-Carb Seafood Bake with Shrimp, Scallops or Fish, Spinach and Mushrooms turn out silky and golden every time.

• Give mushrooms space : Use a 12-inch skillet so the sliced mushrooms brown instead of steam. If yours is smaller, cook them in two batches.
• Thaw shrimp smartly : If your shrimp are frozen, thaw them in a bowl of cold water for about 15 minutes, then press them between paper towels until completely dry.
• Cube the cream cheese : Cut the softened cream cheese into small pieces and whisk it into the cream over medium-low heat. High heat can turn the sauce grainy.
• Taste before folding : I always taste the sauce before adding the seafood, since Parmesan and scallops bring extra salt later. Adjust the pepper and lemon juice at that point.
• Fold fish gently : I cut scallops or fish into even 1½-inch pieces and stir with a wide spatula, so flaky cod or halibut stays in chunks.

Serving Suggestions

• Plate it while it’s still glossy: Let the bake rest the full 5 minutes so the sauce thickens, then spoon it over a bed of cauliflower rice in shallow bowls. Make sure each portion gets a mix of shrimp, scallops, mushrooms, and sauce. A scatter of fresh parsley, a lemon wedge, and a little extra Parmesan make it look polished. For a relaxed dinner, I set the whole baking dish on a trivet and serve family-style, since the bubbling golden top is the best part of this Creamy Low-Carb Seafood Bake with Shrimp, Scallops or Fish, Spinach and Mushrooms.
• Balance the richness with something bright: The cream, cream cheese, and two cheeses call for crisp, acidic sides. A peppery arugula salad with lemon vinaigrette works well, as do roasted asparagus or garlicky green beans. Zucchini noodles sautéed for just 1 to 2 minutes also go nicely, but blot them dry first so they don’t thin the sauce. If you’re not strictly low-carb, a few slices of toasted crusty bread are great for mopping up the sauce.
• Pour something crisp: A chilled Sauvignon Blanc, Pinot Grigio, or dry sparkling wine cuts through the cream and plays off the lemon juice in the sauce. For a non-alcoholic option, I like sparkling water with cucumber slices and a squeeze of lemon.
• Match it to the occasion: On a weeknight, the bake and a simple salad make a complete meal for six with no fuss. For date night or guests, spoon the sauce and seafood into individual ramekins, shorten the bake time, and check early so the shrimp stay tender. Pair with a glass of wine and a lemony green salad for a restaurant-style dinner at home.

Variations & Substitutions

This bake is forgiving, so feel free to adjust it to what’s in your fridge or what your table needs. These tweaks are tested and keep the sauce creamy and the seafood tender.

• Switch up the seafood : Use all shrimp, or replace the scallops with cod or halibut chunks. For a special-occasion twist, gently fold in 8 ounces of lump crab meat.
• Smart cheese swaps : If I’m out of Parmesan, Pecorino Romano works beautifully, and Gruyère or provolone can stand in for mozzarella. Pecorino is saltier, so cut the salt.
• Go dairy-free : Replace the heavy cream with full-fat canned coconut cream, the cream cheese with a dairy-free version, and the butter with olive oil. Add nutritional yeast on top.
• Try broccoli instead : I sometimes swap the spinach for small broccoli florets, steamed until crisp-tender, since they reheat better than wilted greens.
• Turn up the heat : Replace the Italian seasoning and paprika with 1½ teaspoons Cajun or Old Bay seasoning, adding red pepper flakes for gentle heat, and halve the salt.

Recipe FAQs

• Can I use frozen spinach instead of fresh? Yes, thaw it and squeeze very dry.
• How do I know the shrimp are done? Pull when they’re pink and curled into a “C.”
• Can I freeze this Creamy Low-Carb Seafood Bake with Shrimp, Scallops or Fish, Spinach and Mushrooms? Yes, but freezing only the sauce base works best.
• How do I keep the sauce from getting watery? I always pat seafood dry and brown mushrooms thoroughly.

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