Slow cooker chicken sausage casserole with herbs in rich savoury gravy

Slow Cooker Chicken & Herb Sausage Casserole

A proper slow cooker chicken sausage casserole should be generous, rich and worth waiting for. This version brings together tender chicken sausages with herbs, slow-cooked until the gravy deepens and the vegetables soften into something comforting and full of character. It’s the kind of easy sausage casserole recipe you set up in the morning and come home to in the evening — perfect for a steady weeknight supper or a relaxed Sunday table.

Slow cooking allows the flavours to build naturally. The herbs lift the savoury base, the sausages stay juicy, and the sauce thickens into a proper British-style casserole. Serve it straight from the pot, family-style, with mash or crusty bread. Simple ingredients. Honest method. Big, warming flavour.

Serves: 4 people
Prep Time: 20 minutes
Cook Time: 3 hours 30 minutes
Total Time: 3 hours 50 minutes

Ingredients

Add all 7 ingredients (£19.20 total)

Sausages, Chicken & Herb (GF) 400g

Sausages, Chicken & Herb (GF) 400g

£6.90
Onion Each

Onion Each

1 onion - sliced

£1.00
Celery (per pack)

Celery (per pack)

2 sticks - sliced

£1.80
Garlic - Each

Garlic - Each

2 cloves - crushed

£0.90
Tomatoes

Tomatoes

400g - chopped 

£3.40
Chicken Stock In a Can - 500ml

Chicken Stock In a Can - 500ml

200ml 

£4.10
Dunn Rivers, Dried Thyme 40g

Dunn Rivers, Dried Thyme 40g

1 tsp

£1.10

Additional Ingredients

  • Salt and freshly ground black pepper
  • Plain Fluor - 1 tbsp
  • Fresh parsley, chopped
  • 1 bay leaf
  • Olive Oil - 2tbsp

Method

Step 1 - Lay the Foundation

Heat the olive oil in a frying pan over medium heat. Brown the sausages until lightly golden on all sides. You’re building flavour — not cooking them through.

Step 2 - Build the Base

Place onion, carrots and celery into the slow cooker. Sit the browned sausages on top.

Step 3 - Create the Sauce

Mix chopped tomatoes, stock, garlic and herbs. Season well. Pour over the sausages and add the bay leaf.

Step 4 - Let It Work

Cook on low for 6–8 hours (or high for 3–4 hours) until tender and the sauce has thickened.

Step 5 - Finish Strong

Remove the bay leaf. Adjust seasoning. Scatter with parsley and serve hot.

Serving Suggestions

Perfect over creamy mashed potatoes. Strong with steamed greens. Or served simply with crusty bread to soak up every last spoonful.

Six sausages. Properly done. Slow-cooked comfort without compromise.

Frequently Asked Questions

  • A chicken sausage casserole is typically cooked on low for several hours until the sausages are tender and the sauce has thickened into a rich gravy.

  • Yes, chicken sausages can go directly into the slow cooker, where they gently cook and absorb flavour as the casserole develops.

  • The sauce thickens naturally as it cooks. If needed, remove the lid towards the end of cooking to allow excess liquid to reduce.

  • Sausage casserole pairs well with mashed potatoes, rice or crusty bread to soak up the gravy.

  • Yes, sausage casserole can be made in advance and reheated gently, with flavours often deepening the next day.