Rockfish with Old Bay Seasoning

Category: Plan Ahead for Stress-Free Weekdays

This dish features a whole rockfish gently seasoned with Old Bay and garlic salt, then topped with butter and fresh lemon slices. Baked at 375°F, it cooks quickly to a moist and flavorful finish. The butter melts into the fish, balancing the zesty seasoning and bright citrus notes. Ideal for an easy, satisfying meal, its simple prep and clean flavors highlight the fish's natural taste without overwhelming it.

Breanna smiling at the camera.
Created By Breanna
Last updated on Wed, 07 Jan 2026 22:21:54 GMT
A rockfish with lemon slices and old bay seasoning. Save
A rockfish with lemon slices and old bay seasoning. | foodiffy.com

This rockfish with Old Bay seasoning is a simple, flavorful dish that’s perfect for busy weeknights or a relaxed weekend meal. It lets the fresh fish shine while bringing in that classic Old Bay spice that’s both comforting and familiar. The whole fish cooks quickly, making it an effortless way to enjoy seafood at home with minimal fuss.

I first made this after picking up a fresh rockfish at the market without a plan. It quickly became a staple because it feels special but comes together so easily.

Ingredients

  • One whole rockfish: fresh fish is key for moist, flaky results look for clear eyes and firm flesh
  • Two tablespoons butter: adds richness and helps meld the seasonings while keeping the fish moist
  • One teaspoon Old Bay seasoning: brings that iconic savory blend that enhances seafood beautifully Pick a good quality brand for the best flavor
  • One teaspoon garlic salt: offers a subtle garlic kick balanced with saltiness If you prefer less salt use plain garlic powder and add salt separately
  • Half a lemon sliced: adds fresh acidity and brightness Squeeze some of the juice over the fish before baking for a lively finish

Instructions

Preheat Oven:
Set your oven to 375 degrees Fahrenheit This temperature ensures the fish cooks evenly and stays tender
Prepare Baking Dish:
Lightly grease your baking dish or line it with foil to prevent sticking and make cleanup easier
Season The Fish:
Pat the rockfish dry with paper towels then sprinkle the Old Bay seasoning and garlic salt inside the cavity and all over the skin This layers the flavors thoroughly
Add Butter And Lemon:
Place the butter on top of the fish in small pats so it melts all over during baking Arrange lemon slices on top and inside the cavity for maximum freshness
Bake:
Transfer the dish to the oven and bake for 20 minutes The fish cooks through while the butter and seasonings create a flavorful sauce
A rockfish with old bay seasoning on it.
A rockfish with old bay seasoning on it. | foodiffy.com

Old Bay is my secret weapon for making seafood approachable and fun at home Whenever I use it I’m reminded of casual summer dinners by the coast, where simple things like fresh fish and a squeeze of lemon make any meal a memory.

Storage tips

Cooked rockfish keeps well in an airtight container in the fridge for up to two days To reheat, warm gently in the oven or skillet to preserve moisture Avoid the microwave if possible to prevent drying out.

Ingredient swaps

If you can’t find rockfish use a similar firm white fish like cod or snapper For a dairy-free version swap butter for olive oil and add a sprinkle of smoked paprika for extra depth.

Serving ideas

Serve this fish alongside roasted vegetables or a simple green salad for light freshness A side of crusty bread is also perfect to soak up the buttery pan juices.

A rockfish with old bay seasoning on it.
A rockfish with old bay seasoning on it. | foodiffy.com

This rockfish recipe combines ease with great taste to make seafood night a success every time.

Frequently Asked Recipe Questions

→ What is the best way to prepare rockfish for baking?

Rinse the rockfish and pat dry. Season evenly with your chosen spices and place it in a greased or foil-lined baking dish to ensure easy cleanup and even cooking.

→ How does Old Bay seasoning enhance the flavor of rockfish?

Old Bay adds a balanced blend of herbs and spices, lending a mildly spicy and savory depth that complements the mild fish without overpowering it.

→ Why is butter used in this dish?

Butter adds richness and moisture, helping to keep the fish tender while blending the spices and lemon flavors into a harmonious finish.

→ Can lemon slices be substituted or omitted?

Lemon slices add a fresh, bright acidity that cuts through the richness. If omitted, consider adding a splash of lemon juice before serving for similar brightness.

→ What is the ideal oven temperature and cooking time?

Bake at 375°F for approximately 20 minutes, ensuring the fish is cooked through but still moist and flaky.

→ How to tell when the rockfish is fully cooked?

Check that the flesh flakes easily with a fork and has turned opaque throughout, indicating it is tender and thoroughly cooked.

Rockfish Old Bay Seasoning

Delicate rockfish flavored with Old Bay and garlic salt, baked with butter and lemon for a simple, tasty dish.

Preparation Time
5 mins
Time to Cook
20 mins
Overall Time
25 mins
Created By: Breanna

Type of Recipe: Meal Prep

Cooking Difficulty: Suitable for Beginners

Cultural Origin: American

Portion Size: 1 Number of Servings

Dietary Options: Low-Carb Friendly, Gluten-Free

Ingredients Required

→ Seafood

01 1 whole rockfish

→ Seasonings and Fats

02 2 tablespoons unsalted butter
03 1 teaspoon Old Bay seasoning
04 1 teaspoon garlic salt

→ Garnish

05 ½ lemon, sliced

Guide to Cooking

Step 01

Set the oven to 190°C (375°F) to preheat.

Step 02

Grease a baking dish or line it with aluminum foil to prevent sticking.

Step 03

Sprinkle Old Bay seasoning and garlic salt evenly over the rockfish, then place it in the prepared dish.

Step 04

Distribute butter and lemon slices on top of the seasoned fish.

Step 05

Place the dish in the oven and bake for 20 minutes until the fish is cooked through and flakes easily.

Extra Suggestions

  1. Ensure the fish is fresh for optimal flavor and cook until the internal temperature reaches 63°C (145°F).

Necessary Equipment

  • Oven
  • Baking dish
  • Aluminum foil (optional)

Allergen Info

Always check ingredient labels for allergens, and talk to a health expert if you’re unsure.
  • Contains fish; be cautious if allergic.