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Slow Cooker Chicken Casserole Recipe (Easy To Prepare)

Slow cooker chicken casserole is a regular in our house – not only is it really quick to prepare, it’s one of those meals that you can literally chuck in whatever vegetables you have going spare – and it works!

It’s definitely the go to dinner made the most out of my slow cooker recipes!

chicken casserole on a plate next to a slow cooker

🛒 What You Need

ingredients laid out for cooking chicken casserole in a slow cooker: boneless chicken thighs, chopped carrots, chopped celery, chopped onion, two cloves garlic, 1 tsp mustard, chicken stock, bowl new potatoes
  • 800g to 1kg boneless chicken thighs (approx)
  • Vegetables: I used carrots, celery, garlic cloves, onions and new potatoes
  • Seasoning/flavours: I used 2 tsp dried mixed herbs, 2 bay leaves and 1 tsp mustard
  • Stock: I used 500ml chicken stock made from one stock pot


Yeah, I know, kind of obvious, huh?! But – what type of chicken? My preference is for boneless chicken thighs – but I’ll add whichever chicken I have. Chicken thighs and drumsticks are cheaper than breast and can usually be left in for longer, but you can use any.

raw chicken placed in slow cooker bowl

I also add the chicken straight to the slow cooker – no faffing about with sealing it in a separate pan. The only meat I usually do this for is when making a sausage casserole in the slow cooker (sausages don’t taste so great if they haven’t been browned before going in a slow cooker – if you’ve ever tried it, you’ll know exactly what I mean!)

Related: My favourite slow cooker chicken recipes


We’ve added all sorts of different vegetables to our chicken casseroles over the years. Carrots, leeks, parsnips, celery, tomatoes, peppers, potatoes, onions – you name it, we’ve likely tried it!

mixed vegetables and chicken in slow cooker before cooking

The beauty of a casserole/stew (the same goes for our slow cooker beef stew) is you can use up any ingredients that are lingering at the back of the fridge and prevent any of that dreaded food waste.


You can use any mixed herbs. I tend to use a dried herb mix in all my casseroles and stews. It usually has thyme, parsley, sage, basil, oregano – all great herb additions to any casserole. I also add in a couple of bay leaves.


I’m not a fan of mustard – but I’ve got to say it tastes amazing in a chicken casserole. I usually add 1 tsp. of mustard, but you can add as much or as little as you like. 


I don’t add too much stock as the chicken and vegetables will release quite a bit of liquid during the cooking time. But I do add some – it is a chicken casserole, after all, and chicken tastes great if it is swimming in thick chicken-flavoured gravy/stock!

chicken stock pot before adding to slow cooker chicken casserole

👩‍🍳 Making It

Step 1: Add the chicken to the slow cooker. You can optionally saute the chicken before adding it to the slow cooker. Unless I’m cooking it in a slow cooker with a built-in saute function (like a Ninja Foodi Multi Cooker), I tend to just add it straight in raw.

raw boneless chicken thighs in slow cooker

Step 2: Add all the remaining ingredients to the slow cooker.

uncooked ingredients for chicken casserole in a slow cooker: boneless chicken thighs, chopped carrots, celery,  onions and crushed garlic

Step 3: If you are adding new potatoes, you can add them now too, together with the stock.

new potatoes added to slow cooker with carrots, herbs, celery and raw chicken

Step 4: Place the lid on the slow cooker and set it off on low for 8 to 10 hours, or high for 4 to 6 hours.

How Long Does Chicken Casserole Take To Cook In A Slow Cooker?

On High – 4 to 6 hours.

On Low – 8 to 10 hours.

Check the chicken is cooked through and there are no pink bits – if in doubt, use a meat thermometer. 

Step 5: Check that the chicken casserole is ready and thicken the sauce.

It’s quite likely that the liquid in the slow cooker at the end of the cooking time will be too thin. If I have the time to wait before eating, half an hour before serving, I will take the lid off, turn the slow cooker up to high and stir in a few tablespoons of chicken gravy granules.

If you don’t have the time, just stir in the gravy granules; you might need to add a little extra if it isn’t thick enough for your liking. Just make sure you do it gradually so that you don’t get lumps of gravy hanging about. 

thickening up the gravy after the chicken casserole has finished cooking in the slow cooker

What Can I Serve With A Chicken Casserole?

My favourite way to serve a chicken casserole is to cook everything together – so I will add in some new potatoes at the beginning. There is no need for extra cooking of food later on.

But, sometimes, if the mood takes, we’ll have it with some mashed potato – because mashed potato smothered in yummy chicken casserole and gravy is just unbelievably delicious.

Side note: sweet potato mash works just as well.  

I almost forgot that adding dumplings to a slow cooker casserole is also a winner. The options are endless. You can see why we make it so much…

Money and Time Saving Tips For Making Slow Cooker Casseroles And Stews

I like to keep an eye out for any supermarket offers for either;

a) End of day discounts for vegetables – these are perfect to throw in a stew or casserole; they are usually a long way from going off and still totally okay to use. The same goes for meat – I’ve found some fantastic offers at the end of the day.

b) 3 for 2 offers on pre-chopped vegetables – these can be a real time saver if you are in a rush – or just don’t like chopping vegetables! When they are on offer, they don’t always work out more expensive than buying the vegetables separately. Keep your eyes peeled!

🧾 More Slow Cooker Recipes

👉 Recipe Card (Instructions + Print)

chicken casserole in a bowl next to a slow cooker

Slow Cooker Cooker Chicken Casserole

Yield: 4-6
Prep Time: 10 minutes
Cook Time: 8 hours
Total Time: 8 hours 10 minutes

Slow Cooker Chicken Casserole is quick to prepare - just throw it all in! A delicious comforting chicken stew will be ready and waiting at dinner time!


  • 800g - 1kg boneless chicken thigh fillets/drumsticks/breasts
  • 4 carrots, chopped
  • 2 stalks celery, sliced
  • 2 cloves garlic, crushed
  • 1 - 2 onions, peeled and sliced
  • 500g new potatoes, cut in half
  • 1tbsp mustard
  • 2 tsp dried mixed herbs
  • 2 bay leaves
  • 2 chicken stock cubes/pots
  • 500ml boiling water
  • Gravy granules to thicken


  1. Add all the ingredients to the slow cooker, apart from the gravy granules.
  2. Give everything a gentle stir to mix together.
  3. Place the lid on the slow cooker and set off on low for 8 to 10 hours, or high for 4 to 6 hours.
  4. 30 minutes before the end, take the lid off and stir in 2 to 3 tbsp of gravy granules. Leave the lid off for the last 30 minutes to allow the stock to thicken up. If you aren't able to wait the 30 minutes, just stir in the gravy granules until the desired consistency is reached.
  5. Remove the bay leaves.


You can add any vegetables you have available for this chicken casserole. If you don't add any potatoes to the slow cooker you can serve it with some mashed potato or crusty bread.

Nutrition Information:
Yield: 4 Serving Size: 1
Amount Per Serving: Calories: 664Total Fat: 24gSaturated Fat: 7gTrans Fat: 0gUnsaturated Fat: 16gCholesterol: 338mgSodium: 797mgCarbohydrates: 42gFiber: 5gSugar: 8gProtein: 74g

Did you make this recipe?

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Saturday 2nd of September 2023

Being fed up with most of my dishes which have a sauce/gravy mix being way too watery, I decided to try the dishtowel under the lid tip. Worked brilliant and didn't have to thicken it at all.

Just a thought for this recipe...


Friday 21st of July 2023

Can you shred the chicken towards the end?? X

Liana Green

Sunday 24th of September 2023

Hi Kimberley, yes you can shred it towards the end or at the end if you want to.


Thursday 30th of March 2023

My husband reckoned all slow cooker meals are awful and watery with no taste until I made this casserole! I think we have a convert. Thank you Liana!

Paul Houchin

Monday 27th of March 2023

Hi Liana. Followed your chicken casserole recipe pretty much to the letter today and it was delicious, thank you. Both the chicken and the vegetables almost melted in our mouths. A resounding "thumbs up" in our household and definitely a meal I will be cooking again.


Chrissie Burton

Saturday 25th of March 2023

Having tried this recipe, I found that adding pearl barley and red lentils at the beginning with the other vegetables thickens the liquid - delicious!

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