Bayou Butter Andouille Boil Snow Crab: Easy Slow Cooker Seafood Feast

This slow cooker seafood boil brings the bold flavors of a Louisiana bayou to your kitchen with almost no effort. Snow crab legs, jumbo shrimp, smoky andouille sausage, and tender baby potatoes simmer together in a spiced Cajun butter sauce that's perfect for soaking into rice.

Just layer the ingredients, pour the butter, and let the slow cooker do the work. It's a one-pot dinner that feels like a celebration but is easy enough for a weeknight.

This recipe is all about simplicity and big flavor. You'll start by layering snow crab clusters, raw shrimp, sliced andouille sausage, and baby potatoes in your slow cooker.

Then you'll whisk together a quick Cajun butter with garlic, paprika, and lemon juice, pour it over the top, and let everything cook low and slow. The result is a fragrant, buttery seafood boil that's perfect for scooping over steamed rice. Serve it straight from the pot with lemon wedges and let everyone dig in.

Ingredients

Why this recipe works

The slow cooker creates a gentle, even heat that keeps the shrimp tender and the potatoes perfectly cooked. Because the ingredients are layered and the butter sauce is poured over, the flavors meld together beautifully without any constant attention. The low heat allows the Cajun spices to infuse into the seafood and potatoes, creating a rich, cohesive dish.

Using already-cooked snow crab means it just needs to heat through, so the timing is forgiving. The shrimp cook quickly, and the potatoes and sausage provide a hearty base.

The butter sauce acts as both a cooking medium and a finishing sauce, so every bite is coated in that spiced, garlicky goodness. This method is foolproof and yields a dish that tastes like it simmered all day.

Notes and substitutions

Snow crab clusters are typically sold pre-cooked and frozen; thaw them in the refrigerator overnight before using. If you can't find snow crab, king crab or Dungeness crab work well.

Use raw jumbo shrimp (16–20 count per pound) for the best texture; smaller shrimp may overcook. Smoked andouille sausage adds a deep, smoky flavor; if unavailable, substitute a smoked kielbasa.

The Cajun seasoning can be adjusted to your heat preference. Start with 2 tablespoons and add more if you like it spicier. For a milder version, reduce the cayenne in the seasoning. Baby potatoes hold their shape during the long cook; if using larger potatoes, cut them into 1-inch chunks. The lemon juice brightens the sauce; add it at the end to preserve its freshness.

• snow crab: king crab or Dungeness crab
• andouille sausage: smoked kielbasa or chorizo
• baby potatoes: red potatoes cut into 1-inch chunks
• Cajun seasoning: Creole seasoning or a mix of paprika, garlic powder, onion powder, cayenne, and oregano

Equipment

• Slow cooker (6-quart or larger)
• Small saucepan
• Mixing spoon
• Slotted spoon
• Cutting board
• Chef's knife