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Dinner · Part 2 of 3: Instructions

Slow Cooker Chili Lime Butter Seafood Boil Step-by-step instructions

A slow cooker filled with snow crab, shrimp, corn, and garlic in a glossy chili lime butter sauce, garnished with cilantro.
Prep
Cook
Total
Serves
6
Includes 5 min resting

Before you start

Before you start, make sure the snow crab clusters are thawed if they were frozen. Rinse the shrimp and pat them dry. Smash the garlic cloves with the flat side of a knife to release their flavor.

Melt the butter in a small saucepan or microwave. Have all your ingredients measured and ready to go—this recipe comes together quickly once you begin.

Ingredients at a glance (9)
  • 2 lb snow crab clusters
  • 2 lb raw jumbo shrimp, peeled and deveined
  • 2 cups frozen sweet corn kernels
  • 12 cloves garlic, smashed
  • 1/2 cup unsalted butter, melted
  • 2 tbsp chili lime seasoning
  • 1/4 cup fresh cilantro, chopped
  • Steamed jasmine rice, for serving
  • Lemon wedges, for serving

Instructions

Layer and Pour

  1. Layer the Seafood and Aromatics
    Place the snow crab clusters and raw jumbo shrimp into the slow cooker basin in an even layer. Scatter the sweet corn kernels and smashed garlic cloves over the seafood, distributing them evenly so every bite gets a bit of corn and garlic.
    Look for The slow cooker is filled with seafood, corn, and garlic in a single layer.
    Tip If the crab clusters are very large, break them into smaller pieces so they fit comfortably.
  2. Mix the Chili Lime Butter
    In a small bowl, stir together the melted butter and chili lime seasoning until well combined. The mixture should be smooth and fragrant with a warm amber color from the spices.
    Look for The butter is fully blended with the seasoning, with no visible streaks.
    Tip For a spicier kick, add an extra pinch of chili powder or a dash of hot sauce.
  3. Pour Over the Butter Mixture
    Drizzle the chili lime butter evenly over the seafood, corn, and garlic. Use a spatula to scrape every last bit of the butter from the bowl. Gently toss the ingredients with a spoon to coat everything lightly, being careful not to break the crab clusters.
    Look for The seafood and vegetables are lightly coated with the butter mixture.
    Tip Tossing gently helps the butter reach every piece without damaging the crab.

At the end of this phase, the slow cooker contains a colorful layer of crab, shrimp, corn, and garlic, all lightly coated with the chili lime butter.

The butter should be evenly distributed, and the garlic cloves should be nestled among the seafood. The raw ingredients look fresh and vibrant, ready to transform into a rich, savory dish.

Slow Cook to Perfection

  1. Cook on Low
    Cover the slow cooker and set it to low heat. Cook for 3 hours, or until the shrimp are opaque and the crab is heated through. Avoid lifting the lid during cooking to keep the heat and moisture inside.
    Look for The sauce is bubbling gently and the seafood is opaque and fragrant.
    Safe temperature 145°F (63°C) internal temperature (shellfish)
    Tip Resist the urge to peek—every time the lid is lifted, heat escapes and cooking time increases.
  2. Add the Cilantro
    Once the seafood is cooked, sprinkle the chopped cilantro over the top. Stir gently to incorporate the cilantro into the butter sauce, letting it wilt slightly from the residual heat.
    Look for The cilantro is bright green and fragrant, wilted just slightly.
    Tip Add the cilantro at the end to keep its fresh flavor and color.

After about 3 hours, the slow cooker is filled with a bubbling, fragrant butter sauce. The shrimp are pink and opaque, the crab clusters are steaming, and the corn is tender. The garlic has softened and mellowed, and the aroma of chili and lime fills the kitchen. Everything is coated in a glossy, zesty glaze that looks irresistible.

Finish and Serve

  1. Serve Over Rice with Lemon Wedges
    Spoon the steamed jasmine rice onto a large serving platter or individual plates. Using a slotted spoon, lift the seafood, corn, and garlic from the slow cooker and arrange them over the rice. Drizzle with extra butter sauce from the slow cooker and serve with lemon wedges on the side.
    Look for The platter is filled with rice topped with glistening seafood and corn.
    Tip Squeeze fresh lemon over the top just before eating to brighten the flavors.

The finished dish is a beautiful medley of seafood and vegetables, garnished with fresh cilantro. The butter sauce is thick and glossy, clinging to every piece. When scooped onto a plate of rice, the seafood glistens and steams. The lemon wedges add a bright, citrusy finish that balances the richness of the butter.

Common mistakes

One common mistake is overcooking the shrimp, which makes them tough and rubbery. Keep an eye on the time and check for doneness at the 3-hour mark.

Another mistake is lifting the lid too often to check on the food—this releases heat and extends cooking time. Also, be careful not to stir too vigorously, as that can break the crab clusters into small pieces.

How to tell it’s done

The seafood is done when the shrimp are opaque and firm to the touch, and the crab is heated through. To be safe, insert an instant-read thermometer into the thickest part of a shrimp—it should read at least 145°F (63°C).

The crab meat should be hot and steaming, and the butter sauce should be bubbling gently. The corn should be tender and the garlic soft and fragrant.

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

Coming up in Part 3: common questions

  • Can this recipe be made with frozen seafood?
  • What can be used instead of snow crab?
  • How can the dish be made less spicy?
  • Why does the sauce separate?
  • Can this be cooked on high instead of low?

Also in Part 3: variations (Spicy Cajun Twist, Garlic Herb Butter, Add Smoked Sausage, Citrus Herb Marinade), storage and make-ahead, and the printable recipe card.

Up next · Part 3 of 3

4 variations · storage & make-ahead · 5 answers · printable card

Tips, FAQ & printable recipe (Part 3)← Back to the ingredients (Part 1)