1-First Steps: Preheat and Prep Begin by preheating your oven to 375°F and greasing a baking dish or skillet with butter. This sets the stage for even cooking and prevents sticking. Bring a large pot of water to a boil, add the 1 tablespoon salt and 1 tablespoon seafood seasoning, then cook the 2 lbs large shrimp for 30 seconds until opaque.

2-Cooking and Assembling: After cooking, remove the shrimp and cool for a few minutes, then drain off excess water to keep the filling from getting runny. Combine the shrimp with 2/3 cup mayonnaise, 1/2 teaspoon garlic powder, and 1/2 teaspoon ground black pepper to coat evenly. To learn more about shrimp prep, check out how to cook shrimp properly from reliable sources.

Stir in the 4 ounces shredded mozzarella cheese and 4 ounces shredded medium cheddar cheese, then transfer the mixture to the prepared dish. Melt 1 tablespoon butter and mix with 1/2 cup breadcrumbs, sprinkling it over the top for that crunchy finish. Bake uncovered for 13-15 minutes until the center reaches 145°F, then broil for 1-2 minutes to brown the topping. Let it rest for 15 minutes before serving to allow flavors to meld.