Classic Lobster Thermidor with Dijon Cream Gratin

June 29, 2026 nvvp Food recipes 0

Indulge in a timeless French seafood classic with this Lobster Thermidor with Dijon Cream Gratin. Sweet lobster meat is folded into a rich Dijon cream sauce, topped with Gruyère cheese, and broiled until golden and bubbling. Elegant enough for holidays or date nights, this restaurant-quality dish is surprisingly easy to prepare at home.

Prep Time: 15 minutes
Cook Time: 25 minutes
Total Time: 40 minutes
Servings: 2
Calories: Approximately 650 per serving

Ingredients

For the Lobster

  • 2 whole lobsters (about 1½ pounds each), steamed or boiled
  • 2 tablespoons unsalted butter
  • 2 shallots, finely chopped
  • 2 garlic cloves, minced
  • 1 cup heavy cream
  • 1/2 cup seafood broth
  • 1 teaspoon Dijon mustard
  • 1 teaspoon fresh lemon juice
  • Salt and freshly ground black pepper, to taste
  • 2 tablespoons fresh parsley, chopped

For the Gratin Topping

  • 1/4 cup grated Gruyère cheese or Parmesan cheese
  • Paprika, for garnish

For Serving

  • Fresh lemon wedges
  • Chopped parsley, for garnish

Instructions

Step 1: Prepare the Lobsters

Split the cooked lobsters in half lengthwise using a sharp chef’s knife.

Carefully remove the tail and claw meat, keeping the shells intact for serving.

Cut the lobster meat into bite-sized pieces and set aside.

Clean the shells thoroughly and place them on a baking sheet.

Step 2: Sauté the Aromatics

In a large sauté pan over medium heat, melt the butter.

Add the chopped shallots and cook for 3–4 minutes, stirring occasionally, until softened and translucent.

Stir in the minced garlic and cook for another 30 seconds, just until fragrant.

Step 3: Make the Dijon Cream Sauce

Pour in the seafood broth and simmer for 2–3 minutes to slightly reduce.

Whisk in:

  • Dijon mustard
  • Fresh lemon juice
  • Heavy cream

Continue simmering for 4–5 minutes, stirring frequently, until the sauce becomes smooth, silky, and lightly thickened.

Season with salt and freshly ground black pepper to taste.

Step 4: Add the Lobster

Gently fold the lobster meat and chopped parsley into the warm cream sauce.

Cook for 1–2 minutes, just until the lobster is heated through. Avoid overcooking to keep the meat tender.

Step 5: Fill and Broil

Preheat the broiler.

Spoon the lobster mixture evenly into the reserved lobster shells.

Sprinkle the tops with grated Gruyère or Parmesan cheese.

Dust lightly with paprika for color.

Broil for 3–4 minutes, or until the cheese is melted, bubbly, and lightly golden.

Step 6: Serve

Garnish with extra parsley and serve immediately with fresh lemon wedges.

Enjoy while hot with your favorite side dishes.

Serving Suggestions

This elegant Lobster Thermidor pairs beautifully with:

  • Garlic butter asparagus
  • Roasted baby potatoes
  • Creamy mashed potatoes
  • Buttered green beans
  • Wild rice pilaf
  • Fresh garden salad
  • Crusty French bread
  • Steamed broccolini

Pro Tips

  • Fresh lobster delivers the sweetest flavor, but high-quality frozen lobster meat can also be used.
  • Simmer the cream sauce gently to prevent it from separating.
  • Gruyère provides a traditional nutty flavor, while Parmesan creates a crisp, savory topping.
  • Avoid broiling for too long, as lobster can become tough if overcooked.
  • Add a splash of dry white wine to the sauce for even more depth and classic French flavor.

Storage

Refrigerator: Store leftovers in an airtight container for up to 2 days.

Freezer: Not recommended, as the cream sauce may separate after thawing.

Reheating: Warm gently in a 325°F (165°C) oven for 10–12 minutes, or until heated through. Avoid overheating to preserve the lobster’s tender texture.

Nutrition (Per Serving)

  • Calories: ~650
  • Protein: 40g
  • Carbohydrates: 8g
  • Fat: 48g
  • Fiber: <1g

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