Slow-Cooker Old Bay Butter Garlic Snow Crab and Shrimp Step-by-step instructions

Before you start

Before cooking, make sure the snow crab clusters are thawed if frozen—this helps them heat through evenly. Peel and devein the shrimp, or buy them already prepared. Smash the garlic cloves with the flat side of a knife to release their flavor.

Melt the butter in a small saucepan or microwave-safe bowl. Have the Old Bay seasoning measured and ready. The slow cooker should be clean and dry. No other prep is needed—this recipe is designed to be as simple as possible.

Instructions

Layer and Season

1. 1Layer the Seafood and Corn
   Place the snow crab clusters in the bottom of a 6-quart slow cooker. Scatter the jumbo shrimp over the crab. Add the sweet corn kernels and smashed garlic cloves, distributing them evenly among the seafood.
   Look for The slow cooker is filled about two-thirds full with the seafood and aromatics.
   Tip Keep the crab clusters in large pieces so they are easy to lift out after cooking.
2. 2Pour the Butter and Seasoning
   In a small bowl, stir together the melted butter and Old Bay seasoning. Pour the mixture evenly over the seafood and corn. Do not stir—the layers will mingle as they cook.
   Look for The butter and seasoning coat the top of the seafood in a golden sheen.
   Tip For less spice, reduce the Old Bay to 2 tablespoons; for more heat, add a pinch of cayenne.

At the end of this phase, the slow cooker is filled with the crab, shrimp, corn, and garlic, all coated with the Old Bay butter mixture. The butter is golden and fragrant, and the seasoning is visible on the seafood.

The layers are distinct, with the crab on the bottom and the corn and garlic scattered on top. This is the 'dump it in' moment—everything is ready for the slow cooker to work its magic.

Slow-Cook

3. 3Slow-Cook the Seafood Boil
   Cover the slow cooker and cook on low for 3 hours, or until the shrimp are pink and opaque and the crab is heated through. The butter should be bubbling gently around the edges.
   Look for The aroma of garlic and Old Bay fills the kitchen, and the butter is gently simmering.
   Safe temperature 145°F (63°C) internal temperature (shellfish)
   Tip Avoid lifting the lid during cooking—each peek releases heat and extends the cooking time.

After 3 hours on low, the slow cooker is bubbling gently. The shrimp have turned pink and curled slightly, the crab clusters are steaming, and the butter sauce has deepened in color. The aroma of garlic, Old Bay, and seafood is unmistakable. The corn is tender, and the garlic cloves have softened. The sauce is thin and buttery, not reduced—this is the perfect consistency for spooning over rice.

Serve

4. 4Serve the Seafood Boil
   Using a slotted spoon, transfer the crab, shrimp, corn, and garlic to a serving platter or individual bowls. Serve hot with steamed jasmine rice and lemon wedges on the side. Drizzle extra butter sauce from the slow cooker over each serving.
   Look for The seafood is steaming, and the butter sauce pools at the bottom of the bowl.
   Tip Crack the crab legs at the joints to make the meat easier to pull out.

When you lift the lid, steam rises and the seafood is glistening with butter. The crab legs are bright red-orange, the shrimp are opaque, and the corn is golden. The butter sauce pools in the bottom of the slow cooker. As you plate, the seafood is tender and juicy, and the garlic cloves are sweet and spreadable. A squeeze of lemon adds brightness, and the rice soaks up the sauce beautifully.

Common mistakes

One common mistake is overcooking the shrimp, which makes them rubbery. Keep an eye on the time and check at the 2.5-hour mark. Another issue is lifting the lid too often, which lets heat escape and extends cooking time.

Resist the urge to stir the pot—stirring can break the crab clusters and mash the corn. Also, don't skip smashing the garlic; whole cloves won't release as much flavor. Finally, use a slotted spoon for serving so the seafood doesn't sit in excess butter.

How to tell it’s done

The dish is done when the shrimp are pink and opaque throughout, and the crab is heated through. The internal temperature of the shrimp and crab should reach at least 145°F (63°C).

The butter should be bubbling gently around the edges of the slow cooker, and the corn should be tender. The garlic will be soft and sweet. If you're unsure, cut into a shrimp—it should be firm and white, not translucent. The entire cook time is about 3 hours on low.

• Shellfish: 145°F (63°C) in the thickest part