At least once a week, I have fish. Haddock is a favorite and while I like it simply pan-fried in butter, sometimes I like to dress it up and, on those occasions, I make Baked Haddock au Gratin.

Awhile ago, I canvassed my food blog followers to see if there was interest in smaller sized recipes for one or two servings and there was sufficient interest so I indicated I would, from time to time, develop and post recipes for this particular demographic. This haddock recipe is sized for two servings but is easily doubled if four servings are needed.

I have also tested this recipe by baking it from frozen state (in baking dishes that go from freezer to oven safely) and it turns out fine so it is one that I now have on hand in my freezer for when I want a dressed up haddock dish. Everything but the cheddar cheese goes on to the dish before it is frozen. Note that, if baking the fish from frozen state, additional baking time beyond what is stated in the recipe will be required. If you are planning to freeze this dish for baking later, make sure you use fresh fillets, not fish previously frozen.

This is not an overly complicated recipe. The sauce basically consists of chicken stock, whipping cream, milk, and Dijon mustard with onion, celery, red pepper, and mushrooms sautéed in butter for flavor and all thickened with flour. The dish is then baked in the oven with a breadcrumb and cheddar cheese topping. This recipe can be made gluten-free by using gluten-free 1-to-1 baking flour as the thickener and by using gluten-free breadcrumbs for the topping.

My preference is to use individual au gratin dishes for this recipe for several reasons. First, it keeps the fish intact. Haddock is a fragile fillet and breaks apart very easily. Baking it in an individual serving dish keeps it altogether so the fish serves well and is not all broken apart when plated. It is simply served right in the dish in which it was baked. Second, this sauce is rich and it needs to cover the fish completely so, if using a larger baking dish to bake the two fillets together, make sure the pan is just large enough to accommodate the fillets as there is only adequate sauce for the two fillets. If the sauce runs off the fish (which it will) into the bottom of a pan, it will be spread too thin and may burn and the lovely flavorful sauce will be lost.

The fillets can certainly be baked together in a slightly larger au gratin dish for two. Alternatively, if you don’t have suitably sized au gratin dishes, a baking pan the size of what is used in a toaster oven would likely work for two fillets (e.g., typically an 8”x6” pan) or a 10”x5” baking dish could also work. The other reason I like to use individual baking dishes is that, for presentation purposes, it allows for plating the meal to look like restaurant quality as each individual has their own serving dish (remember, we do eat with our eyes first)!

While I have used haddock in this recipe, any white fleshed fish fillets can be substituted with the sauce.

[Printable recipe follows at end of post]

Baked Haddock au Gratin

Ingredients:

2 haddock fillets, each apx. 5-6 oz (fresh or thawed, if frozen)
Garlic salt (apx. ½ tsp or to taste)
Freshly ground black pepper

1/3 cup chicken stock
1/3 cup whipping cream (36% MF)
¼ cup milk
1 tsp Dijon mustard
1 tbsp butter, melted

1½ – 2 tbsp butter
2½ tbsp finely chopped onion
2½ tbsp finely chopped celery
3 tbsp finely chopped red pepper
1/3 cup sliced white button mushrooms (about 1 oz)
2 tbsp all-purpose flour (or gluten-free 1-to-1 baking flour, if required)

1/3 cup fine breadcrumbs (gluten-free, if required)
2½ tbsp finely grated Parmesan cheese
½ tbsp butter, melted

1/3 cup grated old or medium Cheddar cheese

Paprika (optional)
Green onions and/or slices of orange or lemon for garnish (optional)

Method:

In small bowl, combine the chicken stock, whipping cream, milk, Dijon mustard, and 1 tbsp melted butter. Set aside.

Chop and measure vegetables and grate cheeses.

Preheat oven to 350°F.

Grease two individual-sized au gratin dishes (or a small shallow baking dish just large enough to arrange the fillets in a single layer). Sprinkle fish fillets with garlic salt and pepper. Arrange one fillet in each au gratin dish or single layer if using one baking dish for the two fillets. Note, in order to get the fish fillet to fit in the single au gratin dishes, an end of each fillet may need to be cut off and arranged alongside fillet in au gratin dish. Set aside.

Melt 1½ – 2 tbsp butter in saucepan over medium-high heat. Add the onions, celery, red pepper, and mushrooms. Cook the vegetables just until they are barely tender, stirring frequently (apx. 3 minutes).

Sprinkle flour over the vegetables and stir to combine. Cook for a few seconds, stirring to prevent scorching, then reduce heat to medium low and gradually add the whipping cream and chicken stock mixture. Stir constantly to prevent scorching. Continue cooking until sauce starts to thicken, apx. 1 minute. Add the Parmesan cheese and stir until melted, about 1 minute longer or until sauce is thickened to desired consistency.

Spoon sauce equally over each fillet, covering all areas of the fish completely. Combine the breadcrumbs and the ½ tbsp melted butter. Sprinkle mixture equally over fillets. Place au gratin dishes on foil-lined rimmed baking sheet in case sauce should bubble over. Bake for apx 20-24 minutes, or until breadcrumbs are browned, sauce is bubbling, and fish is thoroughly cooked and flakes easily when tested with a fork. Note that baking times may vary due to size and thickness of fillets.

Sprinkle cheddar cheese over each fillet and return to oven for 1½ – 2 minutes, just until cheese is melted.

Let fish stand for 5-10 minutes to allow sauce to set before serving. Sprinkle each fillet with paprika and garnish with sliced green onions and an orange or lemon slice, if desired.

Serve with choice of potato or rice, and a favorite side of vegetable(s), steamed or stir-fried.

Yield: 2 servings

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Printable Recipe

Print

Baked Haddock au Gratin

This Baked Haddock au Gratin dresses up mild white fish fillets with a delectable cream sauce topped with breadcrumbs and cheddar cheese. Serve with rice or choice of potato and side vegetable(s).

Course Main Course

Cuisine Canadian

Keyword baked haddock au gratin, fish, haddock, seafood

Servings 2

My Island Bistro Kitchen Barbara99

Ingredients

• 2 haddock fillets, each apx. 5-6 oz (fresh or thawed, if frozen)
• Garlic salt (apx. ½ tsp or to taste)
• Freshly ground black pepper
• 1/3 cup chicken stock
• 1/3 cup whipping cream (36% MF)
• ¼ cup milk
• 1 tsp Dijon mustard
• 1 tbsp butter, melted
• 1½ - 2 tbsp butter
• 2½ tbsp finely chopped onion
• 2½ tbsp finely chopped celery
• 3 tbsp finely chopped red pepper
• 1/3 cup sliced white button mushrooms (about 1 oz)
• 2 tbsp all-purpose flour (or gluten-free 1-to-1 baking flour, if required)
• 1/3 cup fine breadcrumbs (gluten-free, if required)
• 2½ tbsp finely grated Parmesan cheese
• ½ tbsp butter, melted
• 1/3 cup grated old or medium Cheddar cheese
• Paprika (optional)
• Green onions and/or slices of orange or lemon for garnish (optional)

Instructions

1. In small bowl, combine the chicken stock, whipping cream, milk, Dijon mustard, and 1 tbsp melted butter. Set aside.
2. Chop and measure vegetables and grate cheeses.
3. Preheat oven to 350°F.

4. Grease two individual-sized au gratin dishes (or a small shallow baking dish just large enough to arrange the fillets in a single layer). Sprinkle fish fillets with garlic salt and pepper. Arrange one fillet in each au gratin dish or single layer if using one baking dish for the two fillets. Note, in order to get the fish fillet to fit in the single au gratin dishes, an end of each fillet may need to be cut off and arranged alongside fillet in au gratin dish. Set aside.

5. Melt 1½ - 2 tbsp butter in saucepan over medium-high heat. Add the onions, celery, red pepper, and mushrooms. Cook the vegetables just until they are barely tender, stirring frequently (apx. 3 minutes).

6. Sprinkle flour over the vegetables and stir to combine. Cook for a few seconds, stirring to prevent scorching, then reduce heat to medium low and gradually add the whipping cream and chicken stock mixture. Stir constantly to prevent scorching. Continue cooking until sauce starts to thicken, apx. 1 -2 minutes. Add the Parmesan cheese and stir until melted, about 1 minute longer or until sauce is thickened to desired consistency.

7. Spoon sauce equally over each fillet, covering all areas of the fish completely. Combine the breadcrumbs and the ½ tbsp melted butter. Sprinkle mixture equally over fillets. Place au gratin dishes on foil-lined rimmed baking sheet in case sauce should bubble over. Bake for apx 20-24 minutes, or until breadcrumbs are browned, sauce is bubbling, and fish is thoroughly cooked and flakes easily when tested with a fork. Note that baking times may vary due to size and thickness of fillets.

8. Sprinkle cheddar cheese over each fillet and return to oven for 1½ - 2 minutes, just until cheese is melted.
9. Let fish stand for 5-10 minutes to allow sauce to set before serving. Sprinkle each fillet with paprika and garnish with sliced green onions and an orange or lemon slice, if desired.

10. Serve with choice of potato or rice, and a favorite side of vegetable(s), steamed or stir-fried.

Recipe Notes

Yield: 2 servings