Cumberland sausages served with sweet potato mash and mustard sauce, a comforting sausage recipe ready to enjoy

Cumberland Sausage & Sweet Potato Mash

Published 02 December 2025 · Updated 09 October 2026

Cumberland sausages with roasted sweet-potato mash and a sharp mustard sauce. The sausage cooking and mustard sauce overlap the final potato-roasting stage; elapsed cook time is 45 minutes. Editorially reviewed; not kitchen tested by The Black Farmer.
Serves 3
Prep 10 min
Cook 45 min
Total 55 min

Ingredients

Adds 2 items across 2 products — £7.62 total.

Pantry ingredients such as oil, salt and herbs are not included.

Other Ingredients You'll Need

  • Sweet potatoes — 2, about 500g total
  • Spring onions — 2, finely chopped
  • Cornflour — 1 tbsp
  • Salt — to taste
  • Wholegrain mustard — 50g
  • Water — 200ml

Method

Roast the sweet potatoes

Heat the oven to 220°C (200°C fan). Roast the two sweet potatoes for 45 minutes, until completely soft.

Overlap the sausage cooking

During the final 15 minutes of roasting, brown the Cumberland sausages in a dry pan for 8 minutes, then finish them in the oven for 7 minutes until thoroughly cooked.

Make the mash

Scoop out the hot flesh and mash with 50g of the butter, the spring onions and salt.

Make the mustard sauce

While the sausages finish, melt the remaining 100g butter, stir in the cornflour for 1 minute, then whisk in the wholegrain mustard and water. Simmer for 5 minutes until smooth.

Frequently Asked Questions

How do I make smooth sweet-potato mash?

Roast the potatoes until completely soft, then mash them while hot with butter.

How should Cumberland sausages be cooked?

Brown the sausages evenly, then finish them in the oven until thoroughly cooked.

What goes well with Cumberland sausage and mash?

Serve with the wholegrain mustard sauce and steamed greens.