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Easy (& Tasty!) Slow Cooker Sausage Casserole

Have you tried making a slow cooker sausage casserole yet?

Sausage casserole in a slow cooker is the perfect weeknight dinner; simply add the ingredients in the morning and come home to a deliciously tasty and filling meal.

Read on to discover how to make sausage casserole in a slow cooker, step by step.

How To Make Sausage Casserole In A Slow Cooker

Sausage casserole can be a flexible recipe, adding in your favourite vegetables and seasonings.

What You Need For Sausage Casserole

  • 12 sausages (adjust depending on how many you are serving)
  • 1 onion, chopped
  • 1 red pepper, deseeded and chopped
  • 400g tin of chopped tomatoes
  • 3 medium carrots, chopped
  • 2 cloves garlic, crushed
  • 1tsp dried mixed herbs
  • 400ml beef stock
ingredients laid out for sausage casserole: 12 sausages on a plate, chopped carrots, chopped onion, chopped red pepper, 1 tsp dried mixed herbs, chopped tomatoes and beef stock pot

Add any extra vegetables you have available, such as celery, sweet potato, leeks, etc.

Making A Slow Cooker Sausage Casserole: Step-by-Step

Step 1: Brown the sausages

I don’t usually brown off my meat before putting it in the slow cooker (but I know plenty of people who do; it’s just a matter of personal preference), but in my opinion, with sausages, it’s a must.

browned sausages on plate

I have tried chucking them straight in the slow cooker, and they don’t taste good. The texture is too soft. If I know I’m going to be in a rush in the morning, I will brown them off the night before and just keep them in the fridge until the morning.

If you have a slow cooker with a built-in sauté function, you can use that, or you can grill or lightly fry them in a pan.

Once they are browned, add them to the slow cooker.

browned sausages in slow cooker

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

As mentioned, you can add whatever fresh vegetables you prefer; just use what you have available. Such is the beauty of a sausage casserole! You can add some additional herbs and spices if you wish.

Step 3: Stir everything together before putting the lid on.

ingredients stirred slow cooker sausage casserole

Step 4: Cook on low for 7 to 9 hours or high for 4 hours

How long you leave it on is up to you. If you will be out of the house for a long time, don’t worry if it is left on for longer than 9 hours (on low). Just know that the sausages will be very soft after this length of time.

With this slow cooker sausage casserole, you might want to thicken up the sauce a little at the end, depending on how you like your gravy. If you like it thicker, you can leave the lid off for the last 30 minutes or stir in some gravy granules or corn flour.

It tastes great served with mashed potatoes!

Can You Put Raw Sausages in a Slow Cooker?

Yes, you can put sausages in raw, but they’re not going to taste that great. Not only will they remain the same colour as they went in, but they’ll also have the same texture: soft, squidgy, and not really that pleasant! So, do your taste buds a favour and quickly brown the sausages before you put them in the slow cooker.

How Long Do You Cook Sausages in a Slow Cooker?

How long you cook sausages in a slow cooker will depend on how much time you have. I like to put mine on early in the day so that I don’t need to think about it anymore, so I’ll usually put it on low for 7 to 9 hours. But there are always those days where I forget, or I’m just generally running behind, so if I need to put the sausages on high in the slow cooker, I’ll leave them in for around 4 hours.  

Can You Put Frozen Sausages in a Slow Cooker?

People have differing opinions on cooking food from frozen in a slow cooker. Personally, I would never cook something frozen in a slow cooker, so I can’t recommend putting frozen sausages in a slow cooker. 

Can You Freeze Sausage Casserole?

Yes, you can freeze sausage casserole. Allow it to cool completely, transfer it into an airtight container, and pop it in the freezer. It can be kept in the freezer for up to 3 months. When ready to use it, just remove it from the freezer and let it defrost completely. Then reheat it in a suitable container, ensuring it is heated all through.

Top Tip: Date and label the container in your freezer so you don’t forget what it is!

More Slow Cooker Recipes

I hope you enjoy this slow cooker sausage casserole recipe! Let me know in the comments if you end up making it.

slow cooker sausage casserole

Sausage Casserole Slow Cooker

Yield: 4-6
Prep Time: 15 minutes
Cook Time: 7 hours
Total Time: 7 hours 15 minutes

A warm and comforting slow cooker sausage casserole is the perfect end of day meal! Be as flexible as you want by adding in all your favourite vegetables.


  • 12 thick pork sausages
  • 1 onion, chopped
  • 1 red pepper, deseeded and chopped
  • 400g tin of chopped tomatoes
  • 3 medium carrots, chopped
  • 2 cloves garlic, crushed
  • 1tsp dried mixed herbs
  • 400ml beef stock


  1. Brown off the sausages under a grill or in a little oil in a pan.
  2. Drain off any fat and add to the slow cooker.
  3. Add the remaining ingredients and stir to mix together.
  4. Cook on low for 7 to 9 hours or high for 4 hours.
  5. Serving suggestion: Serve with mashed potato and green veg.
Nutrition Information:
Yield: 4 Serving Size: 1
Amount Per Serving: Calories: 288Total Fat: 19gSaturated Fat: 6gTrans Fat: 0gUnsaturated Fat: 12gCholesterol: 59mgSodium: 789mgCarbohydrates: 14gFiber: 3gSugar: 8gProtein: 17g

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03/13/2024 07:21 pm GMT

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Saturday 18th of May 2024

Well I decided this morning to have a 'use up session' found some cheapo frozen sausages at the back of the freezer, through the whole packet in the slow cooker on saute along with an onion to brown off. Then added a pinch of 'savoury' , tomato puree, tins of tomatoes, cannelloni beans, pinto beans, an odd sweet potato (chopped small) frozen mushrooms , a packet of Beef Stew mix, salt and pepper, popped the lid on and it was lovely. Have frozen some of it for a rainy day.

Thank you for the inspiration.


Sunday 22nd of October 2023

Prior to cooking the sausage recipe in the slow cooker can you brown them off in an air fryer? If so, for how long and at what temperature?

Liana Green

Wednesday 20th of December 2023

Hi Keith - yes you could brown them off in the air fryer, good idea! I'd suggest cooking them at 200°C for about 3 to 5 minutes, just enough to brown them and get rid of the soft skin.


Tuesday 25th of April 2023

I did this recipe and fully reccomend! I used beef and black pudding sausages, carrots, onion, cherry tomatoes, celery and red peppers. It turned out lovely!!


Monday 25th of October 2021

Hi I haven’t tried a casserole with chopped tomatoes before, what does this do for the casserole in terms of taste wise, I’m a rookie slow cooker chef!

Liana Green

Saturday 13th of November 2021

Hi Ryan - I find it add some extra tomato flavour as well as bulks out the meal - they can be left out if preferred :)


Thursday 5th of August 2021

Absolutely brilliant! Just loved this.

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