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.
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?
After the recipe card below, you can read more information about cooking, serving suggestions, and cooking tips for our slow cooker sausage casserole.
📖 Step by Step Recipe
Slow Cooker Sausage Casserole with Onion and Mushrooms
Ingredients
- 1 tablespoon Olive Oil
- 2 Red Onions - cut into rings
- 1 teaspoon Balsamic Vinegar
- 6 Sausages
- 100 grams Bacon Lardons
- 190 grams Mushrooms - We like chestnut mushrooms
- 1 teaspoon Garlic Puree - or 2 cloves minced
- ½ tablespoon Sundried Tomato Puree - or 1 tablespoon regular tomato puree
- 500 ml Beef Stock - I reccomend using reduced salt cubes
- ½ teaspoon Mixed Herbs
- 2 Bay Leaves
- 1 tablespoon Cornflour
Instructions
- 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 tablespoon Olive Oil, 2 Red Onions
- Add a splash of balsamic vinegar to the onions once softened and stir through with the lid off.1 teaspoon 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 teaspoon Garlic Puree, ½ tablespoon Sundried Tomato Puree, ½ teaspoon Mixed Herbs, 2 Bay Leaves
- Mix together cornflour with equal amount of water until smooth and lump free.1 tablespoon 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 for6 hours on Low (Recommended for best results)or4 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 tablespoon of cornflour with 1 tablespoon 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.
Video
Nutrition
This post was originally posted on 26/029/2021. It has been updated with more advice on ingredients and how to make slow cooker sausage casserole. We moved the recipe card up in the post on 18/06/2024 to make it more user-friendly.
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- Use good quality sausages with a high pork content for better taste and health benefits, such as Heck sausages which contain 97% pork.
- Onions- Preferable to use red onions, but white or brown onions work as well. Sautee in olive oil over low heat with the lid on until soft, then add balsamic vinegar for a rich sweetness.
- Bacon Lardons- Add a savory, salty flavor to the casserole. Can be substituted with chopped strips of bacon.
- Mushrooms- Use sliced chestnut mushrooms, white mushrooms, or whole baby button mushrooms.
- Sundried Tomato Puree & Garlic- Sundried tomato puree adds depth and richness, and can be substituted with regular tomato puree. Garlic enhances flavour.
- Dried Herbs- Use dried mixed herbs and bay leaves. Fresh herbs should be added at the end of cooking if desired.
- Cornflour -Helps thicken the sauce. Mix with an equal amount of water before adding to prevent lumps.
- Stock- Use beef stock made from a low salt stock cube with boiling water. Avoid adding extra liquid initially, as more liquid will be released during cooking.
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 don't have the time, you can cook it in the slow cooker for 4 hours on the high setting.
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.
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.
More Slow Cooker Recipes
If you enjoy our Slow Cooker Sausage Casserole with Onion and Mushrooms. Then you will probably like some of our other slow cooker recipes too.
Our slow cooker chilli con carne is another meaty choice.
Or check out our large choice of slow-cooked recipes for the oven.
From delicious slow-cooked Italian pot roast. Melt in your mouth Greek lamb Kleftiko or slow cooked lamb shoulder. Our popular British slow roast silverside beef or Croatian Lamb Peka, there's bound to be something you like.
Frances Webb says
This recipe is absolutely delicious. I usually do the recipe for 4 people and would like to do it for 8 people. What volume slow cooker do I need for 8 people.
Marianne says
A hit with my family . Made for the second time today but with more sausages for my greedy men
Luke and Kay says
Thank you for taking the time to review our Slow Cooker Sausage Casserole with Onions and Mushrooms Recipe, Marianne! We're delighted to hear that it was a hit with your family and that you had to make a second serving of this delicious casserole due to the high demand from your hungry men. 🙂
Gemma says
Can I freeze and reheat?
Kay says
Hi Gemma, yes, you can freeze this recipe, but make sure to defrost fully and when reheating, the casserole needs to be piping hot throughout before consuming, enjoy 🙂
Mairi says
I'm not very good at cooking. How much cornflour is needed for this recipe?
Kay says
Thanks, Mairi, our mistake this should have been in the recipe card 🙂
Mix 1 tablespoon of cornflour with 1 tablespoon of water, mix until lump-free, then add to the pot.
Enjoy the recipe 😉
Rigby says
Best Sausage Casserole I have come across, not full of tomatoes, tastes proper meaty.
Well done great recipe
Kay says
Thank you so much, Elaine, for the comment and rating; it is appreciated 🙂
So pleased to hear you thought our slow cooker sausage casserole the best you have cooked 😉
Chrisi says
Absolutely glorious! Best sausage casserole I’ve ever made - assuming the balsamic was what lifted it but what a great tip!
Kay says
Thank you so much Chrisi 🙂
It's fantastic to hear you thought our slow cooker sausage casserole was the best you have ever made 😉
Toni says
It was a huge hit at my house! I will definitely make it again!
Kay says
Thank you, Tony
It's brilliant to hear that our sausage casserole was a big hit 😉
Enjoy!!
Brenda says
Is it ok to double ( or more) to cater for 6 rugby hungry teenagers?
Kay says
Thanks, Brenda, for the question?
Yes, you can double the ingredients; just go to the x2 section on the recipe card; that will help 🙂
Enjoy!
serena says
So perfect for a chilly Saturday!
Kay says
Thanks Serena 🙂
This is the perfect winter warmer recipe; enjoy!!
Amy Roskelley says
This is great. Definitely share more slow cooker recipes!
Kay says
Thank you so much, Amy
We will be sharing out more slow cooker recipes soon 🙂
Enjoy!!
Kayla DiMaggio says
This sausage casserole was amazing! I loved all the flavors!
Kay says
Thank you so much, Kayla
Glad you loved all the flavours 🙂
Audrey says
My family loved this recipe and I loved it because the slow cooker makes things so easy!
Kay says
Thanks, Audrey
Great to hear the family loved the slow cooker sausage casserole 🙂
Lara says
My husband LOVES this meal. A real family pleaser, and perfect for a comforting weeknight dinner.
Kay says
Thanks, Lara
Glad your husband liked the sausage casserole 🙂
It's a perfect winter warmer recipe 😉
Linda says
Love this casserole! So easy to make and flavorful. Plus, it's my comfort food after a long hectic day
Luke says
Thank you, Linda 🙂
This is the perfect winter warmer comfort food, so glad you like our sausage casserole 🙂
Enjoy!!