Slow Cooker Chili Lime Cajun Seafood Boil

This slow cooker seafood boil brings together snow crab, jumbo shrimp, sweet corn, and baby red potatoes in a chili-lime butter sauce that simmers all day. Just layer everything in the crockpot, set the timer, and let the slow cooker do the work.

The result is a tender, juicy, and deeply flavorful meal that tastes like a coastal feast with zero fuss. Perfect for busy weeknights or casual gatherings.

A seafood boil usually means a big pot, a lot of stirring, and a messy stovetop. This slow cooker version flips that: you simply layer the raw seafood, corn, and potatoes in the crockpot, pour over a warm chili-lime butter sauce, and walk away.

Hours later, you come back to a bubbling pot of tender crab, plump shrimp, and buttery vegetables. The sauce turns glossy and coats everything, while the low, gentle heat keeps the seafood from overcooking. Serve it over rice with lemon wedges for a complete and satisfying dinner.

Ingredients

Why this recipe works

The slow cooker's low, steady heat cooks the seafood gently, so the shrimp stay plump and the crab meat stays sweet and flaky.

Unlike a rapid boil, which can toughen shellfish, the slow cooker's moist environment keeps everything tender and juicy. The butter sauce slowly melds with the seafood juices, creating a rich, cohesive glaze that clings to every piece.

Because everything cooks in one pot, the flavors mingle and deepen over time. The potatoes absorb the seasoned butter, the corn turns sweet and tender, and the crab and shrimp release their briny essence into the sauce. No need to babysit a pot or stir constantly—this recipe is truly set-it-and-forget-it.

Notes and substitutions

Snow crab clusters are typically sold frozen and pre-cooked, so they only need to warm through in the slow cooker. Thaw them in the refrigerator overnight before adding to the pot.

If using raw crab, make sure it cooks until the meat is opaque and reaches 145°F (63°C). Jumbo shrimp are ideal because they hold up well to the long cook time, but large shrimp also work.

Chili-lime butter is a flavored butter that you can find in the dairy section or make at home by mixing softened butter with chili powder, lime zest, and a pinch of salt. If you cannot find it, substitute melted butter with a squeeze of lime and a teaspoon of chili flakes. Baby red potatoes are best because they hold their shape, but any waxy potato works.

• snow crab clusters: king crab legs or lump crabmeat (add crabmeat during the last 10 minutes to avoid overcooking)
• jumbo shrimp: large shrimp or peeled crawfish tails
• baby red bliss potatoes: Yukon Gold potatoes cut into 1-inch chunks
• chili-lime butter: melted butter mixed with 1 tablespoon chili powder and 2 teaspoons lime zest

Equipment

• 7-quart slow cooker
• slotted serving spoon
• measuring cups
• cutting board
• chef's knife