Lobster Grilled Cheese

Lobster is too special to just lob onto a sandwich with a few slices of American cheese. It really must be the star - but it also deserves a strong supporting cast. Hearty sourdough that crisps up beautifully in butter. And a creamy, citrusy filling that makes the whole thing sing.

That's the inspiration behind this lobster grilled cheese. Two layers of Gouda, a mascarpone filling studded with cheddar, scallions, Dijon, and lemon - and a mountain of butter-poached lobster tucked in between.

The good news: it's not complicated. The mascarpone filling comes together in one bowl, the bread gets time to turn golden and crisp in a covered skillet, and the lobster goes in at the very end so it just warms through without overcooking. Fifteen minutes, start to finish.

If you need butter-poached lobster step by step, I've got you covered -- my Butter Poached Lobster Tails post walks you through the whole process. And if you're on a lobster kick, my Lobster Pizza with Burrata and Creamy Lobster Pasta are two more ways to make two tails feel like a celebration.

Key Ingredients:

I used lobster tails from our friends at Sizzlefish - use this link for 10% off your first order. They arrive frozen and thaw beautifully in cold water in about 35 minutes

For this recipe, I split the tails lengthwise before poaching - cut down the top shell with kitchen shears, then use a chef's knife to cut through the meat and bottom shell so each tail is completely halved. Poaching lobster with the shell on protects the meat from overcooking and adds extra flavor to the butter (which you should DEFINITELY save for drizzling over grilled fish, veggies and pasta!) After poaching, the meat pulls out easily and chunks up perfectly for the sandwich.

Full ingredient list and measurements in the printable recipe card below.

Why This Recipe Works

The mascarpone filling is what makes this sandwich. It's rich enough to hold everything together, but the lemon, Dijon, and garlic keep it from feeling heavy. Every element is doing something.

Using two cheeses also gives you two textures. The Gouda melts into that classic pull. The mascarpone mix stays creamier, almost sauce-like - which is exactly what you want when you're working with lobster chunks.

The covered skillet is the other key move. Starting with the lid on lets the cheese melt fully without burning the bread before the interior is ready. Then the lobster goes in at the very end, just long enough to warm through.

Step-by-Step Instructions

Step 1: Make the mascarpone filling.

Combine mascarpone, shredded cheddar, scallions, lemon zest and juice, Dijon, grated garlic, and a pinch of salt and black pepper. Stir until smooth and combined.

Step 2: Build the sandwiches.

Layer Gouda over all four slices of bread. Spread 2 tablespoons of mascarpone filling over the cheese on two of the slices. Leave the sandwiches open for now.

Step 3: Cook covered.

Melt butter with oil in a large skillet over medium. Place bread into the skillet, open-faced, so everything cooks at once. Cover the skillet and cook 4-5 minutes, until the cheese is melted and the underside of the bread is deep golden and crisp.

Step 4: Add the lobster.

Remove the lid. Add the lobster chunks onto the mascarpone-covered half. Press the plain Gouda half on top to close each sandwich. Let the sandwiches sit in the skillet for another 30-45 seconds - just enough to warm the lobster through.

Step 5: Rest and slice.

Transfer to a cutting board and let the sandwiches rest for 2 minutes before slicing and eating.

What kind of lobster should I use?

Butter-poached lobster is ideal - tender and cooked just enough that it warms through beautifully in the final 30-45 seconds in the skillet. I split my tails lengthwise and poached them shell-on for extra flavor, then chunked the meat before assembling.

That said, you've got options. Already-cooked leftover lobster (what a luxury) works beautifully - just add it directly to the sandwich to warm through. Sizzlefish also offers shelled lobster chunks if you want to skip the shell work entirely.

For a couple of great budget-friendly options, langostino lobster tails are a fantastic swap - sweet, lobster-adjacent, and available frozen at most grocery stores. Argentine red shrimp also work well and bring a similar richness at a much lower price.

Can I use a different bread?

The slight tang of sourdough balances the richness of the mascarpone and lobster in this recipe, and it crisps up beautifully in butter without going soggy. A sturdy country loaf would work in a pinch, but avoid anything too soft or thin - it won't hold up to the filling.

Can I swap out the Gouda?

Gouda melts smoothly and has a mild, slightly sweet flavor that lets the lobster and mascarpone filling take center stage. I've made versions of this sandwich with Gruyere, havarti and medium cheddar - no complaints with any of them. Let your heart guide you.

What should I serve with lobster grilled cheese?

Honestly, it holds its own as a full meal with a pile of cape cod chips. But if you want to round it out, my 24 Best Sides for Lobster has plenty of options that work here.

Can I make the mascarpone filling ahead?

Yes. The filling can be made up to two days ahead and kept covered in the refrigerator. Take it out about 10 minutes before building the sandwiches so it spreads easily.

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