Name: Slow Cooker Sausage Casserole
Prep time: 15 min
Cook time: 4 h
Total time: 4 h 15 min
Cuisine: British
Ingredients: 8 beef sausages; 2 red onions, chopped; 4 carrots, sliced; 140 g mushrooms, quartered; 400 g chopped tomatoes; 250 ml beef stock; 1 tbsp tomato purée; 1 tbsp soy sauce; 2 tsp mixed herbs; 1 tbsp cornflour; 1 tbsp water; 1 tbsp olive oil; Salt to taste; Black pepper to taste; Fresh parsley for garnish

This Slow Cooker Sausage Casserole is rich, hearty, and comforting. I make it with beef sausages, carrots, mushrooms, and a savory tomato-based sauce that becomes thick and flavorful as it cooks slowly. I like serving it with mashed potatoes, rice, or crusty bread for an easy family dinner.

Ingredients

(Tip: You’ll find the full list of ingredients and measurements in the recipe card below.)

8 beef sausages

2 red onions, chopped

4 carrots, sliced

140 g mushrooms, quartered

400 g chopped tomatoes

250 ml beef stock

1 tbsp tomato purée

1 tbsp soy sauce

2 tsp mixed herbs

1 tbsp cornflour

1 tbsp water

1 tbsp olive oil

Salt to taste

Black pepper to taste

Fresh parsley for garnish

Directions

I preheat the slow cooker on low heat while preparing the ingredients.

I heat the olive oil in a large frying pan over medium heat, then add the chopped onions and cook them for about 5 minutes until softened.

I add the sliced carrots and cook them for another 2 minutes, stirring occasionally. Then I transfer the vegetables to the slow cooker.

In the same pan, I brown the beef sausages on all sides for 5–8 minutes until nicely colored, then transfer them to the slow cooker.

I remove any excess fat from the pan if needed. Then I add the chopped tomatoes, beef stock, tomato purée, soy sauce, mixed herbs, salt, and black pepper. I stir everything well and bring it to a gentle simmer.

I pour the sauce mixture into the slow cooker over the sausages and vegetables.

I cover and cook on LOW for 8 hours or HIGH for 4 hours.

Halfway through cooking, I add the mushrooms.

I mix the cornflour with the water until smooth, then stir it into the casserole during the final 30 minutes to thicken the sauce.

I garnish with fresh parsley before serving.

Servings and Timing

This recipe makes 4 servings.

Prep time: 15 minutes

Cooking time: 4 hours on HIGH or 8 hours on LOW

Total time: 4 hours 15 minutes on HIGH

Calories: 610 kcal per serving

Variations

I sometimes use chicken sausages instead of beef sausages for a lighter version.

I like adding bell peppers, celery, or potatoes when I want the casserole to be even heartier.

For a richer sauce, I add a splash of Worcestershire-style sauce or a little extra tomato purée.

For a spicier version, I add chili flakes or a pinch of smoked paprika.

Storage/Reheating

I store leftovers in an airtight container in the fridge for up to 3 days.

To reheat, I warm the casserole gently on the stove over medium-low heat until hot throughout. I can also reheat it in the microwave in short intervals, stirring between each one.

I freeze cooled portions for up to 3 months. I thaw them overnight in the fridge before reheating.

FAQs

Can I put raw sausages straight into the slow cooker?

I prefer browning the sausages first because it gives them better color and flavor. I can add them raw, but the finished casserole may have a softer texture and less depth of flavor.

Can I make this sausage casserole thicker?

Yes, I thicken it with cornflour mixed with water during the final 30 minutes. I add a little more cornflour slurry if I want the sauce even thicker.

What can I serve with slow cooker sausage casserole?

I like serving it with mashed potatoes, rice, pasta, or crusty bread. It also works well with steamed vegetables on the side.

Can I make this recipe ahead of time?

Yes, I can cook it ahead and store it in the fridge. The flavor often becomes even better the next day after the sauce has had time to settle.

Can I use different vegetables?

Yes, I can add or swap vegetables such as potatoes, peppers, peas, celery, or green beans. I add softer vegetables later so they do not overcook.

Conclusion

This Slow Cooker Sausage Casserole is a cozy, filling dinner that I love making when I want something easy and comforting. The tender sausages, vegetables, and rich tomato sauce make it a satisfying meal that works well for family dinners, meal prep, or cold evenings.

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