Seafood Casserole with Ritz Crackers
Comforting, Creamy, and Buttery the Ultimate Family Seafood Bake
If you’re searching for the perfect seafood casserole with Ritz crackers, you’re likely craving comfort, flavor, and simplicity without sacrificing that restaurant-worthy feel. This beloved New England-style seafood bake brings together tender shrimp, flaky fish, buttery scallops, and a golden, crispy topping that sings with every bite.
But not all seafood casseroles are created equal.
Some are bland. Others dry out. And many lose that beautiful contrast between creamy base and crunchy top. This version solves all that and then some.
Table of Contents
My Story With This Dish
The first time I tasted a seafood casserole with Ritz crackers was at a coastal diner in Maine one of those charming, no-frills spots where locals gather, and tourists lean in wide-eyed. I remember the hush that fell over our table after the first bite: creamy, slightly briny seafood, wrapped in a rich, savory sauce, and crowned with that unmistakable buttery Ritz crunch.
Later, I recreated it at home for a Friday night family dinner, and it’s been a comfort classic in our kitchen ever since tweaked over the years with smart shortcuts, secret touches, and better seafood.
Now it’s your turn.
PrintSeafood Casserole with Ritz Crackers (Creamy, Crunchy, Comforting!)
This creamy seafood casserole with Ritz crackers combines shrimp, scallops, white fish, and a rich savory sauce under a buttery, crispy crust.
- Prep Time: PT15M
- Cook Time: PT25M
- Total Time: PT40M
- Yield: 6 servings 1x
- Category: Casserole
- Method: Baked
- Cuisine: New England
Ingredients
1/2 lb shrimp
1/2 lb scallops
1/2 lb white fish
2 tbsp butter
1 small shallot
2 cloves garlic
1 tsp Dijon mustard
1/2 tsp Old Bay seasoning
Juice & zest of 1/2 lemon
1 cup half-and-half
2 tbsp flour or cornstarch
1/2 cup Parmesan
1 tbsp parsley
Salt & pepper
1 sleeve Ritz crackers
3 tbsp melted butter
Instructions
1. Preheat oven to 375°F and grease baking dish.
2. Sauté shallots and garlic in butter.
3. Whisk in flour, cream, lemon juice, mustard, and seasoning.
4. Lightly sear seafood until opaque.
5. Combine sauce, seafood, and Parmesan in a bowl.
6. Pour into dish, top with crushed Ritz + butter.
7. Bake 20–25 min until bubbling.
8. Garnish and serve.
Notes
Use fresh or frozen seafood (thawed). Add Ritz just before baking for best crunch.
Nutrition
- Serving Size: 1 portion
- Calories: 420
- Sugar: 3g
- Sodium: 730mg
- Fat: 27g
- Saturated Fat: 13g
- Unsaturated Fat: 12g
- Trans Fat: 0g
- Carbohydrates: 21g
- Fiber: 1g
- Protein: 25g
- Cholesterol: 95mg
Why You’ll Love This Seafood Casserole
Creamy & Cozy: Think rich seafood chowder, but oven-baked with a crunchy twist.
Easy to Make: Simple prep, no roux, no complicated steps just layer and bake.
Family-Friendly: Even kids who are picky about fish love this one.
Ritz Cracker Crunch: That golden, salty topping is everything.
Holiday-Table Worthy: It’s humble enough for weeknights but elegant enough for guests.
Pain Points Solved
🔸 “Seafood gets rubbery or overcooked.”
→ Not with this method. We gently pre-cook delicate seafood like scallops and shrimp before baking to avoid drying them out.
🔸 “It’s often bland.”
→ This recipe layers flavor with garlic, lemon zest, Dijon mustard, and fresh herbs.
🔸 “Casseroles get soggy or watery.”
→ A light touch of thickener in the cream base prevents separation, and the topping goes on last-minute for max crunch.
🔸 “Too time-consuming.”
→ This version uses smart shortcuts (no roux, pre-cooked seafood, one pan) so prep is under 20 minutes.
Ingredients
- 1/2 lb shrimp, peeled and deveined
- 1/2 lb sea scallops
- 1/2 lb white fish (haddock, cod, or tilapia)
- 2 tbsp butter
- 1 small shallot or 1/2 onion, finely chopped
- 2 cloves garlic, minced
- 1 tsp Dijon mustard
- 1/2 tsp Old Bay or seafood seasoning
- Juice and zest of 1/2 lemon
- 1 cup half-and-half or heavy cream
- 2 tbsp flour or cornstarch (for thickening)
- 1/2 cup grated Parmesan
- 1 tbsp chopped fresh parsley (optional)
- Salt and pepper to taste
- 1 sleeve Ritz crackers (about 30 crackers)
- 3 tbsp melted butter
Ingredient Roles & Subs
- Seafood: Shrimp, scallops, and white fish give variety. You can use imitation crab, cooked lobster, or canned crab.
- Cream: Half-and-half makes it lighter; sub full cream for richness or milk + extra flour for a lighter version.
- Ritz crackers: No substitute delivers the same buttery crunch, but you can use crushed panko + melted butter in a pinch.
Instructions
Preheat oven to 375°F (190°C). Grease a 2-quart baking dish.
Sauté aromatics: In a skillet, melt 2 tbsp butter. Add chopped shallots/onion and garlic. Sauté for 2-3 minutes until translucent.
Add cream & seasonings: Stir in flour to form a paste. Slowly whisk in the cream, Dijon mustard, lemon juice + zest, Old Bay, and a pinch of salt/pepper. Simmer until thickened, 3-5 minutes.
Prep seafood: Pat seafood dry. If scallops or shrimp are large, cut them in half. Lightly sear all seafood in a hot skillet for 1-2 minutes per side. They should be just opaque (not fully cooked).
Combine: In a large bowl, gently mix seafood and sauce. Fold in Parmesan.
Pour into baking dish: Smooth the top.
Make Ritz topping: Crush crackers (not too fine), mix with melted butter. Sprinkle evenly over the casserole.
Bake for 20–25 minutes until bubbling and golden.
Garnish with fresh parsley. Serve hot.
Serve and Enjoy
Serve your seafood casserole with:
- A wedge of lemon
- Crisp green salad
- Steamed green beans or asparagus
- Warm baguette or garlic bread
Tip: Spoon onto plates, ensuring each scoop has a golden topping layer and plenty of creamy sauce.
Storage & Freezing Tips
Fridge: Store leftovers in an airtight container for up to 3 days.
Freezer: Wrap unbaked casserole tightly; freeze up to 2 months.
To thaw: Let thaw overnight in fridge before baking as usual.
Expert Tips for Perfect Results
Don’t overcook the seafood before baking.
Season the sauce well seafood needs flavor boosters.
Avoid watery casserole: pat seafood dry before cooking.
Use a shallow baking dish for better crust coverage.
Best Way to Reheat Leftovers
- Preheat oven to 325°F.
- Cover casserole with foil to retain moisture.
- Bake 15–20 min until warmed through.
- Broil for 2 minutes to re-crisp topping (optional).
Avoid microwaving it makes seafood rubbery.
Common Mistakes to Avoid
Skipping the pre-cook on seafood can lead to watery or rubbery texture.
Adding Ritz too early topping turns soggy.
Using frozen seafood without thawing adds too much moisture.
Overbaking dries out delicate fish and cream base.
Smart Meal Prep & Money-Saving Tips
Use frozen shrimp & fish on sale just thaw thoroughly and pat dry.
Prep the entire casserole in the morning and refrigerate. Add Ritz topping and bake just before dinner.
Swap part of the seafood with canned crab or white beans to cut cost.
Tasty Ideas to Serve with This Dish
Simple arugula or kale salad with lemon vinaigrette
Rustic bread or garlic knots
Grape juice spritzer or cucumber-mint lemonade
Roasted broccolini or sautéed spinach
What Makes This Recipe Different
Balanced richness no heavy overload
Ritz topping that stays crisp
Smart prep to avoid common seafood pitfalls
Nostalgic and modern all at once
Why You’ll Love This Dish
Whether you’re channeling coastal New England charm or simply feeding a hungry crew, this seafood casserole with Ritz crackers hits all the right notes. Creamy, comforting, crunchy it’s everything a baked seafood casserole should be.
FAQs
1. What kinds of seafood are best in a seafood casserole with Ritz crackers?
Shrimp, scallops, cod, haddock, or tilapia are excellent. You can also add crab or lobster.
2. Can I use frozen seafood?
Yes just thaw completely and pat dry to avoid excess moisture.
3. Can I make this ahead of time?
Yes! Assemble the casserole, refrigerate, then add the topping and bake when ready.
4. What’s the best substitute for Ritz crackers?
Crushed butter crackers or panko breadcrumbs mixed with melted butter.
5. How do I avoid a soggy topping?
Add the Ritz cracker mixture just before baking.
6. Can I make it gluten-free?
Use GF crackers or almond flour topping and cornstarch instead of flour in the sauce.
7. Can I freeze this dish?
Yes assemble (without topping), freeze, then bake from thawed.
8. What if I don’t eat shellfish?
Use firm white fish only, or swap with cooked chicken and veggie stock.
9. What herbs go well with this dish?
Parsley, thyme, chives, or dill.
10. How many people does it serve?
4–6 generous servings.
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