Simple Slow Cooker Sausage Casserole

Pin image of our slow cooker sausage casserole served in a white bowl with creamy mash and peas on the side

Pouring gravy from our Slow Cooker Sausage Casserole over sausages served with mash and peas

Pin images of our slow cooker sausage casserole with the top image of stirring the sausage casserole with a wooden spoon and the bottom image is Sausage Casserole served with mash and peas in a large white bowl

The best slow cooker sausage casserole recipe, sausages cooked in a slow cooker with stock, onions and mushrooms. A delicious and easy to prepare slow cooker recipe idea.

Pouring gravy from our Slow Cooker Sausage Casserole over sausages served with mash and peas

The sausage, onions, mushrooms and beef stock give this dish a rich flavour. While the garlic and dried herbs add subtle notes of spice. With all these ingredients combined together, your family will love this recipe!

How to make Slow Cooker Sausage Casserole?

Watch our video to see how easy it is to prepare this hearty slow cooker meal. The majority of cooking is in the morning. Then it is left all day to cook, ready to enjoy later on in the evening.

Click here for to jump straight to the printable sausage casserole recipe card

Ingredients for sausage casserole.

The ingredients needed for cooking a sausage casserole recipe in the slow cooker are as follows.

These first 3 ingredients are best when cooked before you transfer to the slow cooker.

Sausages

We like to use good quality sausage with a high pork content, so we know exactly what we are eating! Like the Heck sausages which contain 97% pork.

Browning off six sausages in a cast iron pan and turning them over with black and silver tongs

Onions

We like to use red onions, white or brown onions can be used instead. Sautee the onions in olive oil in a frying pan slowly over low heat with the lid on. Cook until soft before adding a splash of balsamic vinegar to add an extra rich sweetness to the casserole.

Sliced red onion rings frying in a cast iron pan

Pouring balsamic vinegar over sliced red onion ring cooking in a cast iron pan

Bacon Lardons

I love the savoury, salty flavour bacon lardons add to this sausage casserole. You can cut up stips of bacon instead.

Mushrooms

Sliced chestnut mushrooms or white mushrooms or use whole baby button mushrooms.

Sundried Tomato Puree & Garlic.

Sundried tomato puree adds a great depth and richness to the sausage casserole, it can be substituted with tomato puree.

Fresh or Dried Herbs in a slow cooker?

When using a slow cooker, it is important to use dried herbs. Due to the long period of cooking time, fresh herbs do not do well in the slow cooker.

Sliced chestnut mushrooms, cooked sliced red onions, bacon lardons, sundried tomato puree, garlic puree, mixed herbs and two bay leaves in a slow cooker pot

We use dried mixed herbs and a couple of bay leaves.

If you really wanted to add fresh herbs you can add them at the end of cooking.

Cornflour

Cornflour is brilliant for slow cooker recipes as it helps thicken the sauces up. We use it in with the stock during cooking. And also add more at the end to thicken up the sausage casserole gravy.

It is important to first mix the cornflour with an equal amount of water to prevent lumps from forming.

Water pouring into a white bowl with cornflour

Stock

We like to use beef stock made from a stock cube with boiling water. I highly recommend using a low salt version, the bacon is already supplying us with a salty flavour.

Six pork sausages on top of the casserole mixture in a slow cooker pot

Do not be tempted to add more liquid, the browned sausages will be sat on top of the ingredients and won't be submerged in the liquid.

This is normal and during cooking, more liquids will be released from the food and steam. and your sausages will have liquid over them by the end of cooking time as can be seen below!

Do I have to brown sausages before slow cooking?

You don't have to brown sausages before putting them in the slow cooker casserole dish.

But they taste and look a lot better when you do. Who wants an anaemic soft-skinned sausage on their plate?

Sausage casserole cooking time in the slow cooker?

For best results cook this simple sausage casserole in the slow cooker on the low setting for 6 hours.

If you have not got the time you can cook in the slow cooker for 4 hours on the high setting.

Two sausages with mushrooms and bacon lardons on a wooden spoon

Slow cookers are fantastic for slow-cooked meals. However due to the lid being on during the whole cooking time the casserole is naturally going to be too runny.

To resolve this we thicken the gravy up adding cornflour in the casserole dish after it has finished cooking.

How to thicken slow cooker casserole?

If you want to make the casserole gravy thicker, after the full cooking time.

Mix 1 tablespoon of cornflour with 1 tablespoon of water, mix until lump-free, then and add to the pot.

Pouring cornflour mixture into the slow cooker sausage casserole to thicken gravy

Cook on high and keep the lid off. It will thicken within 15 to 30 minutes whilst you prepare the side dishes.

What to serve with Sausage Casserole?

We like to serve our slow cooker sausage casserole on top of a bed of creamy mashed potatoes and peas.

Alternatively, serve with roast potatoes and vegetables. On top of rice, or chop the sausages up and mix them together with freshly cooked pasta.

Slow Cooker Sausage Casserole served with mash and peas in a large white bowl

Slow Cooker Sausage Casserole with Onion and Mushrooms

The best slow cooker sausage casserole recipe. A delicious and easy to prepare slow cooker recipe idea. Sausages, onions, bacon, mushrooms and beef stock give this dish a rich flavour.

While the garlic and dried herbs add subtle notes of spice. With all these ingredients combined and cooked slowly for 6 hours, your family will love the aroma in the house and the flavours it brings to the plate!

Perfect served with mashed potatoes and peas.

Rate this Recipe

Prep Time 10 mins

Cook Time 6 hrs

Thicken Gravy 15 mins

Total Time 6 hrs 25 mins

Course Dinner, Main Course

Cuisine British, French

Servings 4 People

Calories 899 kcal

1 tbsp Olive Oil
2 Red Onions cut into rings
1 tsp Balsamic Vinegar
6 Sausages
100 grams Bacon Lardons
190 grams Mushrooms We like chestnut mushrooms
1 tsp Garlic Puree or 2 cloves minced
½ tbsp Sundried Tomato Puree or 1 tbsp regular tomato puree
500 ml Beef Stock I reccomend using reduced salt cubes
½ tsp Mixed Herbs
2 Bay Leaves
Cornflour

In a pan, gently sautee red onion rings in olive oil over low heat with the lid on for about 6 minutes or until soft, stirring occasionally.

1 tbsp Olive Oil, 2 Red Onions
Add a splash of balsamic vinegar to the onions once softened and stir through with the lid off.

1 tsp Balsamic Vinegar
Meanwhile in another pan and fry off bacon lardons for 2 minutes.

100 grams Bacon Lardons
Place sausages in a medium hot pan, use a fork to pierce skin to allow fat to escape during cooking.

6 Sausages
Keep turning sausages until browned on all sides. They do not need to be cooked through, they will finish cooking in the slow cooker.
Into the slow cooker add mushrooms with cooked onions and bacon lardons.

190 grams Mushrooms
Add sundried tomato puree, garlic, herbs and bay leaves.

1 tsp Garlic Puree, ½ tbsp Sundried Tomato Puree, ½ tsp Mixed Herbs, 2 Bay Leaves
Mix together cornflour with equal amount of water until smooth and lump free.

Cornflour
Pour cornflour mixture in with the beef stock and stir well.

500 ml Beef Stock
Pour stock over the top of all the ingredients and stir through.
Pop the browned sausages on top.
Pop the lid on. Cook for

6 hours on Low (Recommended for best results)

or

4 hours on High
Keep the lid on the whole time. Do not feel tempted to lift it to look inside or stir it! This will affect the total cooking time.
After the full cooking time take the lid off and give a good stir.
If you like a thicker gravy mix 1 tbsp of cornflour with 1 tbsp of water and add to the pot. Turn on high and keep the lid off. It should thicken within 15 minutes.
Ready to serve, perfect with mashed potato and peas.

Calories: 899 kcal Carbohydrates: 28 g Protein: 53 g Fat: 64 g Saturated Fat: 21 g Polyunsaturated Fat: 8 g Monounsaturated Fat: 29 g Trans Fat: 1 g Cholesterol: 144 mg Sodium: 31249 mg Potassium: 1221 mg Fiber: 1 g Sugar: 22 g Vitamin A: 153 IU Vitamin C: 7 mg Calcium: 109 mg Iron: 5 mg

Keyword crockpot, easy sausage casserole, mushroom and onion gravy, sausage casserole, slow cooker, slow cooker recipe

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If you enjoy our Slow Cooker Sausage Casserole with Onion and Mushrooms. Then you will love our slow-cooked Italian pot roast recipe.

Pin image of our slow cooker sausage casserole served in a white bowl with creamy mash and peas on the side

We will be creating more slow cooker recipes to add to our collection soon.