Old Bay Butter Lobster Tails: Easy Crockpot Seafood Boil

This Crockpot seafood boil is the easiest way to get tender lobster tails and jumbo shrimp on the table with almost no effort. Just layer the seafood with bell peppers, sweet onions, and celery, pour over garlic herb butter, and dust with Old Bay.

Set the slow cooker and walk away—hours later, you'll have a bubbling, buttery feast that tastes like a coastal boil without the fuss.

This recipe turns a handful of premium ingredients into a deeply flavorful, hands-off dinner. The slow cooker does all the work, gently poaching the seafood in a garlicky butter bath infused with Old Bay.

The bell peppers and onions soften into a sweet, savory bed, while the celery adds a subtle freshness. The result is a rich, comforting dish that feels special enough for a weekend meal but easy enough for a weeknight.

Ingredients

Why this recipe works

The slow cooker's low, even heat is perfect for delicate seafood. Unlike high-heat methods that can toughen lobster and shrimp, the gentle simmer keeps them tender and moist.

The butter and seasonings meld into a cohesive sauce that coats every bite.

Cooking the seafood in its own juices with the vegetables creates a built-in sauce. The vegetables release their natural sweetness into the butter, balancing the bold Old Bay.

This method requires no stirring, no watching, and no cleanup beyond the slow cooker insert.

Notes and substitutions

Use cold-water lobster tails for the sweetest, most tender meat. They are usually sold frozen; thaw them overnight in the refrigerator before splitting. For the shrimp, choose raw jumbo (21-25 per pound) and peel them for easy eating.

Garlic herb butter can be store-bought or homemade—just melt butter with minced garlic and a pinch of dried herbs. Old Bay seasoning is essential for that classic seafood boil flavor; adjust the amount to your heat preference.

• lobster tails: Use extra large shrimp or crab legs for a more budget-friendly option.
• garlic herb butter: Use plain melted butter with 2 minced garlic cloves and 1 teaspoon dried herbs.
• Old Bay seasoning: Use a mix of celery salt, paprika, black pepper, and cayenne for a homemade version.

Equipment

• 6-quart slow cooker
• slotted spoon
• cutting board
• chef's knife
• measuring cups and spoons