Slow Cooker Old Bay Butter Seafood Boil

This slow cooker seafood boil brings the coastal boil experience home with minimal effort. Snow crab clusters and jumbo shrimp simmer low and slow with sweet corn and baby red potatoes in a rich garlic butter sauce seasoned with Old Bay.

The slow cooker does the work while the kitchen fills with an irresistible aroma. Perfect for a weekend dinner or a casual gathering, this one-pot meal delivers maximum flavor with a dump-and-go approach. Serve it straight from the pot for a rustic, satisfying feast.

A seafood boil is a beloved tradition, but the traditional method requires a large pot, a burner, and constant attention. This slow cooker version simplifies everything: layer the ingredients, pour over a garlicky Old Bay butter sauce, and let the machine work its magic.

The result is tender crab, succulent shrimp, and perfectly cooked vegetables bathed in a savory, buttery sauce. Ideal for busy cooks who want a show-stopping meal without the fuss. The slow cooker also keeps everything warm for serving, making it perfect for casual entertaining.

Ingredients

Why this recipe works

The slow cooker provides a gentle, even heat that cooks the seafood and vegetables without the risk of overcooking or drying out. Unlike a rapid boil on the stovetop, the low temperature allows the flavors of the Old Bay, garlic, and butter to infuse into every bite.

The ingredients steam in their own juices and the seasoned butter, creating a deeply flavorful broth that coats each piece. This method is forgiving, giving you a larger window to check for doneness without ruining the dish.

The layering technique ensures that the dense potatoes and corn, which need longer to cook, are placed at the bottom where the heat is slightly higher, while the delicate seafood sits on top. This way, everything finishes at the same time. The butter sauce, poured over, melts and distributes evenly, carrying the seasonings throughout. The result is a cohesive dish with perfectly textured components, all infused with the same aromatic seasoning.

Notes and substitutions

Snow crab legs are typically sold pre-cooked and frozen; they just need to heat through, which makes them ideal for the slow cooker. If you use raw crab, adjust the cooking time and ensure they reach an internal temperature of 145°F (63°C). Jumbo shrimp are recommended for their size and sweetness; smaller shrimp may cook faster, so check earlier. Baby red bliss potatoes hold their shape well and absorb the sauce nicely. Corn on the cob adds sweetness and a pop of color.

Old Bay seasoning is the classic choice for a seafood boil, with its blend of celery salt, paprika, and other spices. You can adjust the amount to suit your heat preference. The butter sauce is the backbone of this dish; use good-quality unsalted butter so you can control the saltiness.

A 6-quart slow cooker is ideal for this quantity; if yours is smaller, you may need to reduce the ingredients. A slotted spoon is essential for serving without dragging along excess liquid.

• snow crab: king crab or Dungeness crab, cut into clusters
• jumbo shrimp: large shrimp or prawns, peeled and deveined
• baby red bliss potatoes: Yukon Gold potatoes, cut into 1-inch chunks
• Old Bay seasoning: Cajun seasoning or a mix of paprika, celery salt, and black pepper

Equipment

• 6-quart slow cooker
• Small saucepan
• Measuring cups and spoons
• Slotted spoon
• Cutting board and knife