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    Home » Recipes » Seafood and Fish

    Lemon Garlic Butter Tilapia in Slow Cooker

    Published: Dec 20, 2023 by slowcookedeats

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    Crockpot Tilapia is an easy healthy recipe! You'll love this buttery, tender, flaky tilapia that is perfectly seasoned with a flavorful chili rub and lemon garlic butter. Tilapia cooked in a slow cooker is very moist and simple to make.

    Four crockpot tilapia fillets served over rice in a white bowl with fresh parsley.Pin
    Jump to:
    • Why You'll Love Slow Cooker Garlic Butter Tilapia
    • Tilapia Slow Cooker Ingredients
    • How To Make Tilapia Cooked in a Slow Cooker
    • How to Serve Crockpot Tilapia
    • Slow Cooker Fish Tips
    • FAQ's
    • 📖 The recipe.
    • More Slow Cooker Recipes You'll Love
    • 💬 What readers are saying.

    Why You'll Love Slow Cooker Garlic Butter Tilapia

    Flaky and Tender. Slowly cooking the fish with butter adds moisture to your fish and allows it to cook to the perfect doneness. Your fish is done once it reaches 145 degrees F and will be tender; be careful not to overcook it as it will dry out.

    Wonderful Flavors! A great combination of seasoning for fish is garlic, butter, and a little bit of spice and acid. In this recipe, we use chili powder, garlic powder, fresh lemon juice, and butter, but you can add additional seasonings as well!

    Adjustable Cooking Time. You can slow cook your fish on either the low or high setting, depending on when you want to eat. If you cook on high, be sure to check your fish's internal temperature at about 1 hour to prevent overcooking.

    Tilapia Slow Cooker Ingredients

    slow cooker tilapia ingredients on a wooded white board.

    Here are the ingredients you will need to make this crockpot tilapia:

    • Boneless Skinless Tilapia Fillets: try to look for fillets that are all about the same size, if possible, for even cooking to prevent overcooking.
    • Chili Powder: add more or less for your desired heat level.
    • Garlic Powder
    • Coarse Sea Salt: you can also use kosher salt; adjust to taste.
    • Ground Black Pepper
    • Melted Butter: unsalted butter is preferred due to sea or kosher salt. If you use salted butter, you may need to adjust your salt (substitute olive oil instead of butter if desired).
    • Lemon Juice: one regular-sized lemon yields about 2 tablespoons of fresh lemon juice. Adjust as needed--I always suggest extra fresh lemon for serving.
    • Fresh Parsley: fresh chopped parsley is used for garnish.

    For exact ingredient quantities, please see the recipe card below!

    Substitutions and Variations

    • Substitute tilapia with haddock, sea bass, halibut, or cod.
    • Use fresh cilantro in place of parsley if desired.
    • Add other spices, such as crushed red pepper flakes, or add fresh sliced jalapeno to the crockpot to add fresh heat.
    • Add fresh crushed or minced garlic for a more fragrant garlic flavor.
    • You can use lime juice in place of lemon juice if preferred.
    • Adding fresh sliced onion to your slow cooker adds a complementary flavor.
    • Adjust the amount of fish needed for your family and adjust your seasonings for the amount as well.
    • Use olive oil in place of butter if you would like to as well!
    • Use frozen tilapia in a pinch and adjust your cooking time as needed.

    Be sure to save this pin to Pinterest! 🙂

    Slow cooker tilapia on a white plate.Pin

    How To Make Tilapia Cooked in a Slow Cooker

    Mixing the crockpot tilapia seasoning then sprinkling over the top of the fish.

    1. In a small bowl, mix together chili powder, garlic powder, salt, and pepper. Coat both sides of the tilapia.

    Placing the tilapia fillets into the bottom of the slow cooker.

    2. Place tilapia on the bottom of the slow cooker. Overlap the tilapia's thick side over the thin side to fit into the crockpot.

    Drizzling the tilapia fillets with butter and lemon juice.

    3. Drizzle with melted butter, pour lemon juice over the top, and sprinkle with fresh parsley.

    Slow cooking the crockpot tilapia until done and just flaky.

    4. Cover and cook on low or high until the fish is cooked and flakes easily.

    How to Serve Crockpot Tilapia

    Removing a tilapia fillet from the crockpot then topping with a little extra pot juices.

    Garnish the tilapia fillets with fresh chopped parsley or cilantro.

    Serve over rice, mashed potatoes, or riced cauliflower.

    Pour some of the pot juices over the fish - it's delicious!

    Serve with a fresh salad, vegetables, croutons, and your favorite salad dressing.

    Meal idea! Create a healthy low-carb meal by serving your slow cooker garlic butter tilapia with cauliflower rice and your favorite vegetables such as asparagus, green beans, or broccoli--yum!

    Slow Cooker Fish Tips

    • Use similar-sized pieces of fish for consistent cooking. Place the thicker sides of tilapia over the thin sides of others to overlap and prevent overcooking your fish.
    • Slow cookers do vary in temperature. Some can run very hot even when they are on low. Check your fish after 1-2 hours.
    • Use a slow cooker liner or aluminum foil for easy cleanup.
    • According to the USDA, the safe temperature for fish is 145 degrees F.

    FAQ's

    How to store it

    Transfer your fish to an air tight container once it has cooled. It should store in the fridge for up to 3 days.

    How to reheat

    Place your fish on a microwave-safe plate and cover. Microwave for 1 minute and continue to heat in 30-second increments until your desired temperature is met.

    Do I need to soak tilapia before cooking?

    It is not necessary to soak your fish before cooking it. If you soak your fish, it could absorb too much water, disrupt the fish's integrity, and become mushy in texture versus tender and flaky.

    Why is my tilapia tough?

    Overcooking your fish will lead to a drier fillet, and the fish proteins constrict and become very tough and chewy.

    How do you keep tilapia from drying out?

    Making sure that you add moisture to your slow cooker when cooking will assist in preventing your fish from drying out. Also, do not overcook your fish by checking your internal temperature so it doesn't exceed 145 degrees F.

    📖 The recipe.

    A white bowl with rice and four crockpot tilapia fillets with lemon wedges.

    Slow Cooker Tilapia Recipe

    Super easy crock pot tilapia with a flavorful chili rub and lemon garlic butter. You'll love how tender this slow cooker fish recipe is!
    5 from 1 vote
    Print Recipe Pin Recipe SaveSaved!
    Author Kori
    Prep Time 5 minutes mins
    Total Time 3 hours hrs 35 minutes mins
    Course Slow Cooker Seafood and Fish Recipes
    Cuisine American
    Servings 4
    Calories 219 kcal

    Ingredients
      

    • 4 boneless and skinless tilapia fillets
    • 2 teaspoons chili powder
    • ½ teaspoon garlic powder
    • ½ teaspoon coarse sea salt or kosher salt (plus extra to taste)
    • ¼ teaspoon ground black pepper
    • 2 tablespoons melted butter (olive oil may be substituted)
    • 1½ tablespoon freshly squeezed lemon juice
    • 1 tablespoon fresh chopped parsley

    Instructions
     

    • In a small bowl mix together chili powder, garlic powder, salt and pepper. Coat both sides of tilapia filets with seasoning.
    • Place the tilapia in the bottom of the slow cooker, overlapping the thick sides of each tilapia fillet over the thin sides of the previous pieces.
    • Drizzle the with melted butter, then pour lemon juice over the top. Sprinkle fresh parsley.
    • Cover and cook on low for 3 to 4 hours, high 2 to 2½ hours or until fish flakes easily.

    Notes

    • Don't miss all of our helpful hints, substitution ideas, cooking tips, and other delicious recipes that can be found in our post. Check it out!
    • VARIATIONS: Haddock, tilapia, sea bass, halibut, or cod may be used; Fresh cilantro may be used in place of parsley;  
    • TOP TIPS:
      • Use similar-sized pieces of fish for consistent cooking. Place the thicker sides of the tilapia overlapping the thinner side of the prior fillet to prevent overcooking.
      • Slow cookers vary in temperature. Some run very hot - even on low. Check the fish after a couple of hours. 
      • Use a slow cooker liner or foil for easy cleanup.
      • According to the USDA the safe temperature for fish is 145 degrees F. 
    • SERVING SUGGESTIONS: Garnish with chopped fresh parsley or cilantro. Serve with rice, riced cauliflower, or mashed potatoes.

    Nutrition

    Calories: 219kcalCarbohydrates: 1gProtein: 34gFat: 9gSaturated Fat: 5gPolyunsaturated Fat: 1gMonounsaturated Fat: 2gTrans Fat: 0.2gCholesterol: 100mgSodium: 441mgPotassium: 552mgFiber: 0.5gSugar: 0.2gVitamin A: 557IUVitamin C: 4mgCalcium: 25mgIron: 1mg

    © 2025 Slow Cooked Eats

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    Image of Kori Butler Slow Cooked Eats founder.

    Hi, I'm Kori! I am a busy full-time working Mom who also balances a husband and 3 kids! The crock pot was literally how I fed my family almost every weeknight - for YEARS! Seriously.

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