Alaska Halibut Olympia

A creamy and comforting Alaskan classic, Halibut Olympia is a savory seafood casserole featuring tender halibut fillets baked over a bed of sweet onions, then topped with a rich sour cream-mayo mixture and a crispy, buttery breadcrumb crust. This regional favorite showcases the flaky texture and mild flavor of halibut in an easy-to-make dish that feels both hearty and elegant.

Why You’ll Love This Recipe

Alaska Halibut Olympia brings together the freshness of premium seafood with the coziness of a baked casserole. It’s the perfect harmony of delicate fish, tangy creaminess, and golden crunch. This dish is easy to prepare and ideal for both weeknight meals and special dinners. Its layered presentation and rich flavor profile make it a reliable go-to when you want something impressive yet approachable.

Ingredients

(Tip: You can find the complete list of ingredients and their measurements in the recipe card below.)

• fresh halibut fillets
• lemon juice
• salt
• black pepper
• sweet onion, thinly sliced
• mayonnaise
• sour cream
• dried dill or parsley
• garlic powder
• chopped green onions or chives
• seasoned breadcrumbs
• melted butter

Directions

1. Preheat oven to 375°F (190°C). Lightly grease a 9×13-inch baking dish.
2. Spread the thinly sliced sweet onions evenly on the bottom of the dish.
3. Layer the halibut fillets over the onions. Drizzle with lemon juice and season with salt and pepper.
4. In a medium bowl, combine the mayonnaise, sour cream, dill (or parsley), garlic powder, and chopped green onions. Mix well.
5. Spread the creamy mixture evenly over the fish.
6. In a small bowl, stir together the breadcrumbs and melted butter. Sprinkle the breadcrumb topping evenly over the creamy layer.
7. Bake uncovered for 30–35 minutes, or until the halibut flakes easily with a fork and the top is golden brown.
8. Let the dish rest for 5 minutes before serving. Pair with roasted vegetables, salad, or rice.

Servings and timing

• Servings: 4 servings
• Prep Time: 15 minutes
• Cooking Time: 35 minutes
• Total Time: 50 minutes
• Calories: Approximately 410 kcal per serving

Variations

• Alternative Fish: Substitute cod, haddock, or another firm white fish if halibut is unavailable.
• Add Fresh Herbs: Use fresh dill, parsley, or tarragon for brighter flavor.
• Spice It Up: Add a dash of cayenne pepper or hot sauce to the sour cream mixture for a kick.
• Lighter Option: Use Greek yogurt in place of sour cream for a tangy, lower-fat alternative.
• Crunch Upgrade: Use panko breadcrumbs or mix in crushed crackers for a crunchier topping.

Storage/Reheating

Storage: Allow the casserole to cool completely. Store in an airtight container in the refrigerator for up to 3 days.

Freezing: Freezing is not recommended due to the dairy content, which may separate upon thawing.

Reheating: Warm in a 350°F (175°C) oven for 15–20 minutes, or until heated through. Cover loosely with foil if needed to prevent over-browning.

FAQs

What is Halibut Olympia?

Halibut Olympia is a baked seafood casserole originating from Alaska, featuring halibut fillets layered with onions, topped with a creamy sour cream-mayo mixture and a crunchy breadcrumb topping.

Can I make this dish with frozen halibut?

Yes, but thaw the halibut completely and pat it dry before using to prevent excess moisture in the casserole.

What sides pair best with Halibut Olympia?

It pairs well with roasted vegetables, steamed green beans, wild rice, or a simple salad.

Can I use low-fat mayonnaise or sour cream?

Yes, you can substitute with low-fat versions, but the flavor and texture may be slightly lighter.

How do I know when the halibut is done?

The fish is fully cooked when it flakes easily with a fork and reaches an internal temperature of 145°F (63°C).

Can I prep Halibut Olympia ahead of time?

Yes, assemble the dish up to 4 hours in advance, cover, and refrigerate. Bake just before serving.

What can I use instead of breadcrumbs?

Crushed crackers, cornflakes, or even crushed potato chips can be used for a different texture and flavor.

Is this dish gluten-free?

Not by default. To make it gluten-free, use gluten-free breadcrumbs and ensure all other ingredients are gluten-free.

Can I add vegetables?

Yes, thinly sliced mushrooms or spinach can be added between the onion and fish layers for extra depth.

How do I avoid a soggy bottom?

Be sure to slice the onions thinly and do not add extra liquid to the dish. Preheating the oven and avoiding over-layering helps too.

Conclusion

Alaska Halibut Olympia is a creamy, flavorful casserole that highlights the delicate texture of halibut with comforting, savory layers. Its simple preparation, hearty appeal, and signature crunch make it a standout seafood recipe that brings the best of Alaskan cooking to your kitchen. Perfect for sharing and sure to satisfy, this dish is a delicious way to enjoy halibut year-round.

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