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    Home » Recipes » Slow Cooker

    Slow Cooker Chicken Casserole

    image of Lucy's face
    Modified: Sep 21, 2025 · Published: Oct 27, 2018 by bakingqueen74 · This post may contain affiliate links · 12 Comments
    331 shares
    Jump to Recipe

    Now it’s autumn it’s time to get back to basics with slow cooking, so I’m sharing my favourite recipe for slow cooker chicken casserole.

    Chicken thigh with herbs on a fork in front of white serving dish of casserole.

    I use chicken thighs in my chicken casserole, as they have so much flavour and also stand up really well to slow cooking all day.

    It’s easy to switch to chicken breast if you prefer though and they do also work well in this recipe!

    Just make sure you don’t cook for more than 6 hours on low or chicken breast can go dry and a bit stringy.

    Jump to:
    • Slow cooker casserole tips
    • Ingredients
    • Step by step instructions
    • Sides
    • Hob/stovetop instructions
    • More to try
    • More slow cooker recipes
    • Recipe
    • Reviews

    Slow cooker casserole tips

    As I slow cook so many meals, I’ve got loads of tips on slow cooking to share with you.

    This chicken casserole or chicken stew recipe is the result of a lot of tweaks as I’ve made it over and over again over the years, and improved it a bit almost every time.

    • Use sweet potatoes instead of normal potatoes
    • Chicken thighs on the bone add loads of flavour
    • Red lentils create a naturally thick sauce
    • Place the vegetables at the bottom of the pot
    • Brown the chicken thighs
    • Thicken naturally by adding a couple of tablespoons of plain flour

    As potatoes often stay hard when you slow cook, I’ve replaced them with sweet potato.

    Better for you, they also help to thicken the sauce as they cook and disintegrate, and don’t take so long to soften.

    You still need to make sure you put the sweet potato in the bottom of the slow cooker, this is a good way to make sure potatoes cook through and soften.

    Ingredients

    Here’s what you will need for this slow cooker chicken stew. Get the quantities in the recipe card further down.

    • brown onion 
    • carrots 
    • sweet potato 
    • chicken thighs with skin, bone in
    • olive oil
    • chicken stock melt or stock cube
    • water
    • dried parsley
    • minced garlic
    • mixed herbs
    • salt and pepper to taste
    • red lentils
    • plain flour

    Step by step instructions

    1. Layer the sweet potato chunks and onion in the slow cooker pot.
    Slow cooker chicken casserole - sweet potatoes and vegetables in the base of the pot.
    1. Next I brown off the chicken thighs in a pan, so the skin is golden. This makes them look much tastier I find!
    2. Add herbs and seasoning too, so you have layers of flavour building up.
    Slow cooker chicken casserole in pot.
    1. Next I add red lentils and stock.
      Red lentils are great as they help to bulk out the sauce, thickening it so you don’t need to use anything like cornflour or gravy granules but you have the basis of a thick sauce to start with.
    2. Later once the chicken casserole has cooked down a bit and there is more liquid, I add a couple of tablespoons of plain flour which helps the sauce to thicken further.
    Slow cooker chicken casserole - ingredients layered in pot.
    1. Now just leave it to slow cook and do its thing!
      It will bubble away while you are at work/running errands/ferrying kids around, and creating a warming comforting dish you can eat straight from the pot!

    Slow cooker chicken casserole is one of my autumn and winter go-to recipes.

    Sides

    Since it already contains sweet potatoes, vegetables (carrot and onion) and red lentils alongside the chicken thighs, this casserole is a filling and healthy dish on its own.

    A bowlful served alone makes a filling meal already!

    To make a family meal which will serve more people, I also like to serve with mashed potato, crusty bread to dip into the sauce, and steamed broccoli and peas.

    Slow cooker chicken casserole in serving dish with onion, carrots and lentils.

    Hob/stovetop instructions

    If you want to make this but don’t have a slow cooker, follow these steps:

    Step 1. Brown the chicken thighs in a casserole dish/Dutch oven with 1 tsp olive oil, then set aside.

    Step 2. Fry the onions in the remaining oil.

    Step 3. Place the vegetables, red lentils, stock, tomato puree in the casserole dish.

    Step 4. Place the chicken thighs on top, add herbs and seasoning.

    Step 5. Heat on a high heat until at the boil, then turn down to a medium heat and simmer. Cook for 45 minutes to an hour.

    White serving dish of chicken casserole with carrots in background.

    More to try

    • lamb casserole with savoy cabbage
    • beef stew with chorizo
    • pork, leek and apple casserole
    • sausage casserole
    • beef and butternut squash
    • Italian sausage casserole

    More slow cooker recipes

    Check out all my family slow cooker recipes that kids love as well as my slow cooker archives.

    • Turkey stew in slow cooker pot.
      Slow Cooker Turkey Mince Stew
    • Bowl of lamb stew with carrots garnished with parsley.
      Slow Cooker Lamb Casserole
    • View from above of red bowl with sausages and carrots, with tomatoes, bowl of salt, herbs and green beans around it.
      Slow Cooker Sausage and Leek Casserole
    • Chicken thighs and peppers in a white serving dish.
      Slow Cooker Chicken Thighs with Tomatoes & Peppers

    Recipe

    Chicken casserole in white serving dish, carrots and lentils in background.

    Slow Cooker Chicken Casserole

    A traditional chicken casserole made with chicken thighs on the bone, with sweet potato and red lentils to make a delicious naturally thick sauce
    4.96 from 21 votes
    Print Pin Rate Save Saved!
    Course: Main Course
    Cuisine: Slow Cooker
    Prep Time: 15 minutes minutes
    Cook Time: 7 hours hours
    Total Time: 7 hours hours 15 minutes minutes
    Servings: 6
    Calories: 471kcal
    Author: Lucy Allen | BakingQueen74

    Ingredients

    • 1 brown onion approx 175 g
    • 4 carrots approx 300 g
    • 1 sweet potato approx 225 g
    • 1 kg chicken thighs with skin, bone in
    • 2 tsp olive oil
    • 1 chicken stock melt or stock cube
    • 500 ml boiling water
    • 1 tsp dried parsley
    • 1 tsp minced garlic
    • 1 tsp mixed herbs
    • salt and pepper to taste
    • 60 g red lentils
    • 2 tbsp plain flour (all-purpose flour)
    UK Measurements – US Measurements

    Equipment

    large oval slow cooker
    large oval slow cooker

    Video

    Instructions 

    • Heat the olive oil in a pan and brown the chicken thighs on all sides.
      2 tsp olive oil, 1 kg chicken thighs
    • Prepare the vegetables and layer in the base of the slow cooker pot: onion, then carrots and sweet potato chunks.
      1 brown onion, 4 carrots, 1 sweet potato
    • Add the red lentils in with the vegetables.
      60 g red lentils
    • Place the browned chicken thighs on top of the vegetables.
    • Boil the kettle, make up the stock in a jug with the chicken stock melt/stock pot or stock cube.
      1 chicken stock melt, 500 ml boiling water
    • Pour in the stock and sprinkle the herbs and seasoning over the chicken.
      1 tsp dried parsley, 1 tsp minced garlic, 1 tsp mixed herbs, salt and pepper
    • Cook on high for 4-5 hours or on low for 7-8 hours.
    • After around 2-3 hours, when the food has cooked down a bit and there is more liquid in the base of the pot, add 2 tablespoons of plain flour into the liquid. Mix in well with a spoon. This will help the sauce to thicken even more as it cooks.
      2 tbsp plain flour (all-purpose flour)
    • Serve!

    Notes

    This recipe was made in a 5.7 litre oval slow cooker.
    Did you try and love this recipe?Then please leave a star rating and comment below to let me know how you got on!

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    Reader Interactions

    Comments

    1. Jennifer Dawson says

      January 10, 2024 at 8:38 am

      Could I omit the lentils altogether we don’t eat them at all

      Reply
      • bakingqueen74 says

        January 10, 2024 at 12:32 pm

        Yes sure if you don’t want to include them.

        Reply
      • Jennifer Dawson says

        January 10, 2024 at 7:25 pm

        Thank you so much for this recipe I made it today had it with mash potatoes it was delicious This is going to be in regular rotation in my house from now on

        Reply
        • bakingqueen74 says

          January 26, 2024 at 6:40 pm

          ah brilliant! 🙂

          Reply
    2. Jo Allison / Jo's Kitchen Larder says

      November 02, 2018 at 1:41 pm

      This recipe is absolutely delicious Lucy! I made it yesterday in my Instant Pot but using slow cooker function and we all loved it! Used mixture of thighs and drumsticks and served it with buttered egg spätzle. Perfect autumnal casserole and so much goodness too! 🙂 x

      Reply
      • bakingqueen74 says

        November 02, 2018 at 4:31 pm

        That’s great Jo! Brilliant you can make it in an Instant Pot as well!

        Reply
    3. Emma says

      October 28, 2018 at 6:39 pm

      This looks like the perfect, warming mid-week meal!!! And love that you can leave it in the slow cooker so it’s ready when you come back from work.

      Reply
    4. Helen says

      October 28, 2018 at 3:28 pm

      This looks like a fabulous family dinner recipe. I love the idea of adding lentils – thicken the sauce and sneaky extra protein and fibre!

      Reply
    5. Janice says

      October 27, 2018 at 4:00 pm

      I love the idea of using lentils to help thicken the sauce, great hack. Thanks for including my Italian Sausage Casserole recipe.

      Reply
      • bakingqueen74 says

        October 27, 2018 at 4:24 pm

        Thanks Janice, I’m loving lentils in everything right now!

        Reply
    6. Camilla Hawkins says

      October 27, 2018 at 12:49 pm

      Love this hearty, warming casserole Lucy, must try it soon! Thanks for linking to my beef casserole:-)

      Reply
      • bakingqueen74 says

        October 27, 2018 at 12:56 pm

        Thanks Camilla!

        Reply
    4.96 from 21 votes (14 ratings without comment)

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    Hi, I'm Lucy! I'm a slow cooker addict, food blogger and also a busy working mum of two. I hope you'll enjoy the recipes I create and post which are perfect for busy families.

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