Slow Cooker Old Bay Butter Seafood Boil Step-by-step instructions

Before you start

Before starting, make sure the lobster tails are split and the shrimp are peeled and deveined. If using frozen corn, measure it out and let it sit at room temperature for a few minutes.

Melt the butter in a small saucepan or microwave, then stir in the Old Bay seasoning. Have all ingredients and equipment ready so the layering process is quick and seamless.

Instructions

Layer and Season

1. 1Layer the Seafood and Aromatics
   Place the split lobster tails and raw shrimp in the bottom of a 6-quart slow cooker. Scatter the sweet corn kernels and smashed garlic cloves over the seafood, distributing them evenly.
   Look for The slow cooker is filled with colorful raw ingredients, ready for the butter bath.
   Tip Keep the lobster tails in a single layer so they cook evenly.
2. 2Pour the Butter and Season
   In a small bowl, stir the melted butter and Old Bay seasoning together. Pour the mixture evenly over the seafood and corn, making sure to coat the lobster tails and shrimp.
   Look for The butter and seasoning create a glossy, aromatic coating on all the ingredients.
   Tip Use a spatula to scrape every bit of the seasoned butter from the bowl.

After layering the seafood, corn, and garlic, and pouring the seasoned butter over the top, the slow cooker should look vibrant with pink shrimp, white lobster, yellow corn, and pale garlic.

The butter should coat everything lightly, and the aroma of Old Bay should be noticeable. This is the moment to ensure all ingredients are evenly distributed.

Slow Cook and Check

3. 3Slow Cook Until Tender
   Cover the slow cooker and cook on low for 3 hours. The butter will melt and bubble gently, infusing the seafood and corn with rich flavor. Do not lift the lid during cooking to keep the heat steady.
   Look for The mixture is bubbling gently, and the aroma of Old Bay and garlic fills the kitchen.
   Safe temperature 145°F (63°C) internal temperature (shellfish)
   Tip If your slow cooker runs hot, check at 2 1/2 hours; the seafood should be opaque and tender.
4. 4Check the Seafood Temperature
   After 3 hours, use an instant-read thermometer to check the thickest part of a lobster tail and a shrimp. They should register at least 145°F (63°C). The lobster meat should be opaque and the shrimp pink and curled.
   Look for The thermometer reads 145°F (63°C) or higher, and the seafood is opaque.
   Safe temperature 145°F (63°C) internal temperature (shellfish)
   Tip If not done, return the lid and cook for 15 more minutes, then check again.

After 3 hours on low, the slow cooker should be gently bubbling, with a rich, garlicky aroma filling the kitchen. The butter will have turned a deep golden color, and the seafood should be opaque. Use a thermometer to confirm the internal temperature reaches 145°F (63°C). The corn should be tender when pierced with a fork.

Serve and Enjoy

5. 5Serve Over Rice with Lemon
   Using a slotted spoon, lift the seafood, corn, and garlic from the butter bath. Serve over steamed jasmine rice with lemon wedges on the side. Drizzle a little of the cooking butter over each serving if desired.
   Look for The seafood is plated over fluffy rice, with bright lemon wedges alongside.
   Tip The leftover butter makes a fantastic dipping sauce for crusty bread.

When you lift the slotted spoon, the seafood and corn should be glistening with butter and seasoned well. The lobster tails should hold their shape but be tender enough to cut with a fork. Plating over rice with lemon wedges adds a fresh, bright contrast to the rich sauce. The dish should look like a celebratory seafood boil.

Common mistakes

One common mistake is overcooking the seafood, which makes it rubbery. Stick to the 3-hour low heat setting and check early if your slow cooker runs hot.

Another is lifting the lid frequently, which releases heat and extends cooking time. Also, avoid using extra-lean butter substitutes, as they can separate and affect the sauce's texture.

How to tell it’s done

The seafood is done when the lobster meat is opaque and the shrimp are pink and curled. An instant-read thermometer inserted into the thickest part of the lobster tail or shrimp should read at least 145°F (63°C).

The corn should be tender and the garlic soft and sweet. If the seafood hasn't reached temperature, continue cooking in 15-minute increments.

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