Authentic Lobster Thermidor with Mustard Crème

By AislePrompt Editorial · Published 2026-04-06 · Updated 2026-04-06

A luxurious French classic using premium lobster and a velvety sauce that honors its 19th-century origins, with a subtle mustard note for depth. This French-inspired seafood recipe, ready in about 22 minutes, pairs lobster tails, butter, dry white wine for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 510 calories and feeds 2, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Ingredients

• 8 oz lobster tails
• 2 tbsp butter
• 1/4 cup dry white wine
• 1/2 cup heavy cream
• 1 tsp Dijon mustard
• 1/4 cup, grated gruyère cheese
• 1 tbsp lemon juice

Instructions

1. Step 1: Poach 8 oz lobster tails in simmering salted water for 4 minutes until opaque, then cool and remove meat from shells.
2. Step 2: Melt 2 tbsp butter in a saucepan over medium heat. Add 1/4 cup dry white wine and simmer for 2 minutes until reduced by half.
3. Step 3: Stir in 1/2 cup heavy cream, 1 tsp Dijon mustard, and 1/4 cup grated gruyère cheese, cooking until the sauce thickens and coats the back of a spoon.
4. Step 4: Gently fold in lobster meat and 1 tbsp lemon juice, then spoon into oven-safe ramekins. Broil for 3 minutes until golden on top.