Cheesy Jumbo Lump Crab Gratin (Print Version)
Jumbo lump crab in creamy three-cheese sauce, topped with golden panko breadcrumb crust and baked until bubbling.
# What You Need:
→ Seafood
01 - 1 lb jumbo lump crab meat, picked over for shells
→ Dairy
02 - 2 tbsp unsalted butter
03 - 1 cup whole milk, warmed
04 - 1/2 cup heavy cream
05 - 1 cup shredded Gruyère cheese
06 - 1/2 cup shredded sharp cheddar cheese
07 - 1/4 cup grated Parmesan cheese
08 - 2 oz cream cheese, softened
→ Aromatics
09 - 1 small shallot, finely chopped
10 - 2 cloves garlic, minced
→ Seasonings
11 - 1/2 tsp Old Bay seasoning
12 - 1/2 tsp Dijon mustard
13 - 1/4 tsp cayenne pepper (optional, for heat)
14 - Salt and freshly ground black pepper, to taste
→ Pantry Staples
15 - 2 tbsp all-purpose flour
16 - 1/2 cup panko breadcrumbs
17 - 2 tbsp chopped fresh chives (plus extra for garnish)
18 - 1 tbsp olive oil or melted butter (for breadcrumb topping)
19 - Lemon wedges, for serving
# Directions:
01 - Preheat the oven to 400°F. Butter a medium gratin dish or 4 individual ramekins and set aside.
02 - In a medium saucepan over medium heat, melt 2 tbsp unsalted butter. Add the finely chopped shallot and minced garlic, sautéing until softened and fragrant, about 2 minutes.
03 - Sprinkle the all-purpose flour into the saucepan and cook, stirring constantly, for 1 to 2 minutes until the raw flour aroma dissipates and the mixture forms a smooth paste.
04 - Gradually whisk in the warmed whole milk and heavy cream, cooking over medium heat until the sauce thickens and becomes smooth, about 2 to 3 minutes.
05 - Add the softened cream cheese, shredded Gruyère, and shredded sharp cheddar to the sauce, stirring until completely melted and creamy. Stir in Dijon mustard, Old Bay seasoning, and cayenne pepper. Season to taste with salt and freshly ground black pepper. Remove from heat.
06 - Gently fold the jumbo lump crab meat and 2 tbsp chopped chives into the cheese sauce, taking care not to break apart the crab lumps. Transfer the mixture evenly into the prepared gratin dish or ramekins.
07 - In a small bowl, combine the panko breadcrumbs, grated Parmesan cheese, and olive oil or melted butter, tossing until the breadcrumbs are evenly moistened. Spread the topping uniformly over the crab mixture.
08 - Bake in the preheated oven for 18 to 22 minutes, or until the filling is bubbling and the topping is a deep golden brown.
09 - Remove from the oven and let rest for a few minutes. Garnish with additional fresh chives and serve warm alongside lemon wedges.
# Expert Tips:
01 -
- The creamy cheese sauce clings to every sweet lump of crab without drowning it, striking a balance that feels luxurious but not heavy.
- That golden panko and Parmesan crust crackles under your spoon and gives way to pure silky richness underneath.
02 -
- Be incredibly gentle when folding the crab into the sauce, broken lumps turn the dish into something closer to a crab dip rather than a gratin.
- A splash of dry sherry or white wine added to the sauce before the cheese takes the flavor to an entirely different level.
03 -
- Always warm your milk before adding it to the roux because cold liquid is the number one cause of a lumpy sauce.
- Pick through the crab meat twice, once on the cutting board and once after adding it to the bowl, because biting into a shell fragment will ruin an otherwise perfect bite.