Baked Halibut with Fennel and Orange is an elegant, flavorful seafood recipe featuring thick, tender halibut fillets roasted over a fragrant bed of shaved fennel and fresh orange slices, finished with melted butter and naturally sweet citrus juices.
This Mediterranean-inspired baked fish recipe combines the delicate sweetness of halibut with the subtle anise flavor of fennel and the bright, refreshing taste of orange. As the fish bakes, the butter melts into the citrus juices, creating a light, glossy sauce that complements every bite.
Perfect for weeknight dinners, holiday gatherings, or special occasions, this simple oven-baked halibut recipe delivers restaurant-quality results with minimal preparation.
With just a handful of fresh ingredients and approximately 30 minutes, you can prepare a beautiful seafood dinner that is both satisfying and easy to make.
Recipe Overview
| Detail | Information |
| Prep Time | 10 minutes |
| Cook Time | 14–18 minutes |
| Total Time | 25–30 minutes |
| Servings | 4 |
| Difficulty | Easy |
| Cuisine | Mediterranean-Inspired |
| Cooking Method | Oven-Baked |
| Oven Temperature | 400°F (200°C) |
| Main Ingredient | Halibut |
| Recipe Type | Main Course |
Why You’ll Love This Baked Halibut Recipe
This citrus butter halibut combines simple ingredients with fresh, elegant flavors.
- Tender, flaky fish: Halibut has firm white flesh that becomes beautifully tender when baked.
- Fresh citrus flavor: Orange slices and juice provide natural sweetness and brightness.
- Aromatic fennel: Shaved fennel adds a delicate herbal flavor that complements seafood.
- Rich butter sauce: Melted butter combines with orange juice and fish juices to create a delicious sauce.
- Easy preparation: Everything cooks together on one baking tray.
- Elegant presentation: Golden citrus slices, fresh fennel fronds, and pearly white fish create a beautiful dish.
- Perfect for entertaining: A sophisticated meal without complicated techniques.
Ingredients for Baked Halibut with Fennel and Orange
This recipe makes 4 servings.
For the Halibut
- 4 thick halibut fillets, approximately 6 ounces (170 g) each
- Salt, to taste
- Freshly ground black pepper, to taste
For the Fennel and Orange
- 1 fresh fennel bulb, thinly shaved
- Reserved fennel fronds, for garnishing
- 1 orange, thinly sliced
- ½ additional orange, for fresh juice
For the Butter Sauce
– 3 tablespoons unsalted butter, cut into small pats
Optional Garnishes
- Additional fresh fennel fronds
- Fresh orange wedges
- A little freshly cracked black pepper
How to Make Baked Halibut with Fennel and Orange
Follow these easy steps to prepare tender oven-baked halibut with sweet citrus, aromatic fennel, and glossy butter sauce.
Step 1: Preheat the Oven
Preheat your oven to 400°F (200°C).
Line a large rimmed baking tray with parchment paper.
Make sure the tray is large enough to hold the four halibut fillets without overcrowding.
Step 2: Prepare the Fennel
Wash the fennel bulb thoroughly.
Remove the stalks and reserve the delicate green fronds.
Trim the base of the bulb.
Cut the fennel in half and remove any particularly tough core.
Using a sharp knife or mandoline, shave the fennel into very thin slices.
Thinly sliced fennel softens more easily during baking and develops a delicate, sweet flavor.
Step 3: Prepare the Oranges
Wash the orange thoroughly.
Cut it into thin, even rounds.
Remove any visible seeds.
Cut the additional half orange and reserve it for squeezing over the fish.
Thin orange slices help distribute citrus flavor throughout the dish.
Step 4: Arrange the Fennel and Orange
Spread the shaved fennel evenly across the prepared baking tray.
Arrange the orange slices over and around the fennel.
Create a neat bed for the halibut fillets.
This layer allows the fish to rest above the tray while absorbing the aromatic citrus juices.
Step 5: Prepare the Halibut
Pat the halibut fillets dry with paper towels.
Check for any remaining bones and remove them if necessary.
Choose fillets of similar thickness for even cooking.
Place the halibut over the fennel and orange slices.
Step 6: Season the Fish
Sprinkle the halibut with salt and freshly ground black pepper.
Season both sides lightly if desired.
Halibut has a delicate flavor, so simple seasoning allows the natural sweetness of the fish to shine.
Step 7: Add Fresh Orange Juice
Squeeze the juice from the reserved orange half directly over the raw halibut.
Allow some of the juice to flow onto the fennel and orange slices underneath.
The citrus juice adds freshness and helps create the flavorful tray sauce.
Step 8: Add the Butter
Cut the butter into small, evenly sized pats.
Place the butter pieces over the halibut fillets.
As the fish bakes, the butter melts and combines with the orange juice and natural cooking juices.
Step 9: Add the Fennel Fronds
Scatter a small amount of fresh fennel fronds over the fish.
Reserve the remaining fronds for garnishing after baking.
The delicate green leaves provide a fresh herbal aroma.
Step 10: Bake the Halibut
Transfer the baking tray to the preheated oven.
Bake at 400°F (200°C) for approximately 14–16 minutes, depending on the thickness of the fillets.
The halibut should become opaque and separate easily into moist flakes.
The fennel should soften, and the orange slices may develop lightly golden edges.
For food safety, the thickest part of the fish should reach 145°F (63°C).
Thicker fillets may require additional cooking time.
Step 11: Check the Fennel and Orange
Carefully remove the tray from the oven.
The fennel should be tender, with some lightly browned edges.
The orange slices should be softened and fragrant.
If you prefer very soft fennel, you can roast the fennel and orange slices alone for 8–10 minutes before adding the fish.
Step 12: Baste with the Citrus Butter Juices
Tilt the baking tray slightly to collect the warm cooking juices.
Using a spoon, drizzle the glossy orange butter sauce over each halibut fillet.
Allow the sauce to coat the surface of the fish.
This finishing step enhances both the flavor and presentation.
Step 13: Garnish with Fresh Fennel
Scatter the remaining fresh fennel fronds over the finished fish.
Add freshly cracked black pepper if desired.
The bright green garnish creates a beautiful contrast with the white halibut and orange slices.
Step 14: Plate and Serve
Carefully lift each halibut fillet using a wide spatula.
Arrange the fish on serving plates with a generous portion of roasted fennel and orange slices.
Spoon additional citrus butter juices over the fish.
Serve immediately while warm.
What Is Baked Halibut with Fennel and Orange?
Baked Halibut with Fennel and Orange is a Mediterranean-inspired seafood dish that combines firm white fish with fresh citrus and aromatic vegetables.
Halibut is known for its mild flavor, delicate sweetness, and firm texture.
Fennel contributes a subtle anise-like aroma that becomes softer and sweeter when roasted.
Fresh oranges add natural sweetness and acidity, balancing the richness of melted butter.
As the ingredients bake together, their juices combine to create a light, flavorful sauce.
The result is a fresh, elegant seafood dish that highlights the natural flavors of its ingredients.
Why Halibut Is Perfect for Baking
Halibut is one of the best white fish varieties for oven-baked recipes.
Firm Texture
Halibut has dense flesh that holds together well during cooking.
Mild Flavor
Its delicate taste pairs beautifully with citrus, butter, and herbs.
Thick Fillets
Thick halibut fillets are ideal for oven baking because they cook evenly when properly prepared.
Beautiful Flaky Texture
When cooked correctly, halibut separates into tender white flakes.
Versatile Flavor
Halibut works well with Mediterranean herbs, garlic, lemon, orange, fennel, and butter.
Why Fennel and Orange Work So Well Together
Fennel and orange are a classic flavor combination in Mediterranean-inspired cooking.
Natural Sweetness
Roasting softens the fennel’s sharp flavor and brings out its natural sweetness.
Bright Citrus
Orange adds a refreshing contrast to the aromatic fennel.
Balanced Flavor
The subtle anise notes of fennel complement the sweet and tangy orange.
Beautiful Presentation
White fennel, golden orange slices, and green fennel fronds create an attractive combination.
Perfect with Seafood
Both ingredients enhance delicate fish without overwhelming its natural flavor.
The Secret to Perfectly Baked Halibut
A few simple techniques help keep halibut moist and flavorful.
Choose Thick Fillets
Thick fillets are less likely to dry out quickly.
Pat the Fish Dry
Removing surface moisture helps the fish cook evenly.
Use a Moderate Oven Temperature
Baking at 400°F (200°C) provides enough heat to cook the fish while allowing the vegetables to soften.
Avoid Overcooking
Halibut is relatively lean and can become dry when cooked too long.
Use a Food Thermometer
Checking the internal temperature helps ensure the fish is fully cooked.
Add Butter
Butter contributes richness and helps create a flavorful finishing sauce.
Serve Immediately
Freshly baked halibut has the best texture when served hot.
How to Make the Citrus Butter Sauce
One of the best features of this recipe is the natural sauce created during baking.
As the halibut cooks, the butter melts over the fish.
The orange juice combines with the butter and cooking juices.
The fennel and orange slices contribute additional flavor.
This creates a light, glossy sauce without the need for a separate saucepan.
For a more concentrated sauce, transfer the tray juices to a small saucepan after removing the cooked fish.
Simmer briefly until slightly reduced.
Spoon the warm sauce over the halibut just before serving.
Best Oranges for This Recipe
Several orange varieties work well.
Navel Oranges
Navel oranges are sweet, juicy, and easy to find.
Cara Cara Oranges
Cara Cara oranges have a sweet flavor and attractive pinkish flesh.
Blood Oranges
Blood oranges provide a slightly tart flavor and dramatic color.
Valencia Oranges
Valencia oranges are juicy and work well for both slicing and squeezing.
For a classic version, fresh navel oranges are an excellent choice.
What to Serve with Baked Halibut with Fennel and Orange
This elegant seafood dish pairs beautifully with light, flavorful side dishes.
Lemon Herb Rice
Fluffy rice seasoned with fresh herbs and lemon complements the citrus sauce.
Creamy Mashed Potatoes
Mashed potatoes provide a comforting contrast to the delicate fish.
Roasted Asparagus
Asparagus adds freshness and color.
Garlic Butter Green Beans
Tender green beans pair beautifully with the buttery sauce.
Mediterranean Couscous
Couscous with parsley, olive oil, and lemon creates a satisfying accompaniment.
Roasted Baby Potatoes
Golden potatoes absorb the citrus butter juices.
Steamed Broccoli
Broccoli provides a simple vegetable side.
Creamy Risotto
A light Parmesan risotto makes the meal feel restaurant-quality.
Wild Rice
Wild rice adds a slightly nutty flavor.
Fresh Garden Salad
A salad with mixed greens, cucumber, and citrus dressing balances the richness of the butter.
For an elegant dinner, serve the halibut with lemon herb rice, roasted asparagus, and extra citrus butter sauce.
Delicious Baked Halibut Variations
Lemon Fennel Baked Halibut
Replace the orange slices with fresh lemon slices for a more tangy flavor.
Garlic Butter Halibut
Add 2–3 minced garlic cloves to the melted butter.
Mediterranean Herb Halibut
Add fresh thyme, rosemary, and parsley.
Blood Orange Halibut
Use blood oranges for a colorful presentation.
Honey Citrus Halibut
Drizzle a small amount of honey over the orange slices before baking.
Fennel and Tomato Halibut
Add cherry tomatoes around the fish.
White Wine Butter Halibut
Add a small splash of dry white wine to the baking tray.
Spicy Citrus Halibut
Sprinkle crushed red pepper flakes over the fish before baking.
Olive Oil Baked Halibut
Replace the butter with extra virgin olive oil for a different flavor profile.
Herb Crusted Halibut
Add a light topping of breadcrumbs and chopped herbs before baking.
Common Mistakes to Avoid
Using very thin fillets: Thin halibut pieces can overcook quickly.
Not slicing the fennel thinly: Thick fennel slices may remain firm after the fish is cooked.
Overcrowding the tray: This can prevent even cooking.
Using too much orange juice: Excess liquid can dilute the sauce.
Overcooking the fish: Halibut can become dry when baked too long.
Skipping the butter: Butter adds richness and helps create the finishing sauce.
Using overly thick orange slices: Thick slices may not soften sufficiently.
Not checking the internal temperature: Cooking time alone does not guarantee doneness.
Forgetting the tray juices: The cooking liquid contains delicious flavor.
Serving the fish too late: Halibut is best enjoyed immediately after baking.
Can I Prepare Baked Halibut Ahead of Time?
Yes. Several components can be prepared in advance.
Slice the fennel and store it in an airtight container in the refrigerator.
Wash and prepare the fennel fronds.
Slice the orange shortly before cooking.
Cut the butter into small pats.
Keep the halibut refrigerated until ready to bake.
For the best texture, assemble and bake the dish just before serving.
How to Store Leftover Baked Halibut
Allow the cooked fish to cool slightly.
Transfer leftovers to airtight containers.
Refrigerate within 2 hours of cooking.
Store in the refrigerator for 3–4 days.
Keep some citrus butter sauce with the fish to help maintain moisture.
How to Reheat
Preheat the oven to 275°F (135°C).
Place the halibut in a covered baking dish.
Add a spoonful of the cooking juices or a little water.
Warm gently until thoroughly heated to 165°F (74°C).
Avoid overheating because halibut can become dry.
Can You Freeze Baked Halibut?
Yes, although freshly baked halibut offers the best texture.
Transfer cooled portions to freezer-safe containers.
For best quality, use within approximately 2–3 months.
Thaw overnight in the refrigerator before reheating.
The fennel and orange slices may become softer after freezing.
Frequently Asked Questions
What is Baked Halibut with Fennel and Orange?
It is a seafood dish featuring halibut fillets baked over shaved fennel and orange slices with butter and fresh citrus juice.
How long should halibut bake at 400°F?
Thick halibut fillets generally take approximately 14–18 minutes, depending on thickness.
What temperature should halibut reach?
For food safety, halibut should reach an internal temperature of 145°F (63°C).
Can I use frozen halibut?
Yes. Thaw completely in the refrigerator before baking.
Can I substitute another fish for halibut?
Yes. Cod, haddock, sea bass, and snapper are suitable alternatives.
What does fennel taste like?
Fennel has a mild anise-like flavor that becomes sweeter and softer when cooked.
Can I use lemon instead of orange?
Yes. Lemon provides a brighter, more acidic flavor.
Should I peel the orange before baking?
No. Thin orange slices can be baked with the peel, although you may remove the peel before eating if preferred.
Can I make this recipe without butter?
Yes. Olive oil can be used as a substitute.
How do I keep halibut moist?
Avoid overcooking, use thick fillets, and spoon the cooking juices over the fish before serving.
Can I add other vegetables?
Yes. Cherry tomatoes, zucchini, asparagus, and thinly sliced onions work well.
What sides go best with baked halibut?
Rice, couscous, roasted potatoes, asparagus, green beans, and fresh salads are excellent choices.
Final Thoughts
Baked Halibut with Fennel and Orange is a fresh, elegant seafood recipe that combines tender white fish with sweet citrus, aromatic fennel, and rich melted butter.
The halibut bakes gently over orange slices and shaved fennel, allowing the flavors to blend into a delicious natural sauce.
Finished with glossy citrus butter juices and fresh fennel fronds, this dish offers a beautiful presentation with minimal effort.
Perfect for weeknight dinners, family meals, and special occasions, this easy oven-baked halibut recipe is a wonderful way to enjoy fresh seafood.
Serve it with lemon herb rice, roasted vegetables, or creamy mashed potatoes for a complete and satisfying dinner.
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