Cheddar Bay Seafood Casserole
Bring the flavors of coastal dining into your kitchen with this indulgent Cheddar Bay Seafood Casserole! Featuring tender shrimp, imitation crab, and creamy sauce topped with the iconic Red Lobster Cheddar Bay Biscuits, this dish is a delightful fusion of seafood and comfort food.

Table of Contents
Chef’s Tips
- Customize Your Seafood: Add scallops, lobster, or even chunks of white fish for variety.
- Vegetable Boost: Stir in diced carrots, corn, or mushrooms for added texture and nutrition.
- Donโt Stir the Topping: For the perfect biscuit crust, evenly spread the biscuit mix on top and resist the urge to mix it into the filling.
Ingredients

- 1 Box Red Lobster Cheddar Bay Biscuit Mix: Includes the seasoning packet.
- 2 cups Milk: For the biscuit batter.
- 1 Stick Butter (Melted): Adds richness to the dish.
- 1 lb Frozen Cooked Shrimp: Peeled, deveined, tails removed, and thawed.
- 3 oz Imitation Crab Meat: Diced for a seafood medley.
- 1 cup Frozen Peas: Adds a pop of sweetness and color.
- ยฝ cup Vegetable Broth: For the creamy base.
- 1 Can Cream of Mushroom Soup: Provides a rich and savory sauce.
- 2โ3 tbsp Cajun Seasoning: Adjust to taste for a spicy kick.
Substitutions
- Imitation Crab: Replace with real crab meat or chunks of lobster.
- Cream of Mushroom Soup: Use cream of celery or cream of chicken soup for a flavor twist.
- Cajun Seasoning: Swap for Old Bay or paprika for a milder flavor.
Instructions
- Prepare the Oven and Dish
Preheat the oven to 350ยฐF. Grease a 13×9-inch baking dish with nonstick spray. - Make the Biscuit Batter
In a bowl, mix the Cheddar Bay Biscuit mix, included seasoning packet, and milk until combined. Set aside. - Whisk the Sauce
In a separate bowl, whisk together the vegetable broth and cream of mushroom soup.


- Assemble the Casserole
- Pour the melted butter into the bottom of the prepared baking dish.
- Layer the shrimp and diced imitation crab evenly over the butter.
- Pour the soup and broth mixture over the seafood.
- Sprinkle the Cajun seasoning evenly over the top.
- Add the frozen peas in an even layer.
- Top with Biscuit Mix
Carefully spread the biscuit batter over the seafood and vegetable mixture, ensuring itโs even. Do not stir.


- Bake
Place the dish in the oven and bake for 45 minutes to 1 hour, or until the center is set and the biscuit topping is golden brown. - Serve
Let the casserole rest for 5 minutes before serving. Scoop into bowls and enjoy the rich, savory flavors!

Storage and Reheating
- Refrigerator: Store leftovers in an airtight container for up to 3โ4 days.
- Freezer: Freeze in a freezer-safe container for up to 3 months. Thaw in the refrigerator overnight before reheating.
- Reheating: Warm in a 350ยฐF oven for 10โ15 minutes, or microwave individual portions until heated through.
FAQs
Yes! If using fresh shrimp, peel, devein, and cook them lightly before layering them in the dish.
Serve with a simple green salad, roasted vegetables, or crusty bread for a complete meal.
You can assemble the casserole up to 12 hours in advance and refrigerate it. Bake just before serving for the best results.

This Cheddar Bay Seafood Casserole is a comforting, crowd-pleasing dish perfect for family dinners or entertaining guests. The blend of creamy, savory seafood and fluffy biscuit topping is sure to make it a favorite at your table!

Cheddar Bay Seafood Casserole
Ingredients
- 1 box Red Lobster Cheddar Bay Biscuit mix
- 2 c milk
- 1 stick butter melted
- 1 lb frozen cooked shrimp peeled, deveined, tail off, thawed
- 3 oz imitation crab meat diced
- 1 c peas frozen
- 1/2 c vegetable broth
- 1 can cream of mushroom soup
- 2-3 tbsp cajun seasoning
Instructions
- Preheat oven to 350 degrees and prepare a 13 x 9 baking dish with nonstick spray.
- In a bowl mix biscuit mix, seasoning packet, and milk until well combined – set aside.ย
- In a separate bowl whisk together broth and soup – set aside.ย
- Pour melted butter in bottom of baking dish.ย
- Layer in shrimp, then crab meat.ย
- Pour the soup and broth over the shrimp and crab meat.
- Sprinkle on cajun seasoning then frozen peas.
- Evenly spread the biscuit mix over theย top, do not stir!
- Bake for 45 minutes to 1 hour until the center is set and the top is golden brown.ย
- Serve and enjoy!ย
Nutrition
Nutrition values are estimates, for exact values consult a nutritionist.
I havenโt made this yet. I have a question after reading the comments. Are you supposed to prepare the biscuit mix according to the directions as someone stated or not?
Great question! No, you donโt need to prepare the biscuit mix according to the box directions. Instead, just mix the biscuit mix with the included seasoning packet and the 2 cups of milk as stated in the recipe instructions. This creates the right consistency for the topping. Hope that helps, and let me know if you have any other questions! ๐
Man, this sure did smell good when I took it out of the oven but the flavor fell flat. The biscuit mix tasted nothing like like the biscuit you get at Red Lobster, rather bland. wasn’t impressed with dish at all. Won’t be making this again.
I am sorry you felt that way.
Maybe why the taste fell flat with the biscuit mix is if you didn’t add cheddar cheese and the 3/4 cup water to the mix on the box instructions.
Cooked shrimp? Wonโt that overcook it?
Hi Nikki,
With all the moisture in the dish it does not. It warms it, but doesn’t actually cook it to were it gets rubbery. (yuk!)
The directions don’t include when to add the soup/broth mixture.
You are absolutely right. I reviewed my notes and added it. Thank you for catching that and I am sorry if it messed up your recipe.
If I used frozen broccoli instead of peas would the broccoli overcook? An hour is a long time for broccoli.
I agree an hour is a long for broccoli. Did you happen to try it with broccoli? I would love to hear how it turned out.