Scotland’s Borders have given us many traditions, and one of the most comforting is Rumbledethumps. This humble dish of mashed potatoes, swede, and cabbage baked with cheese is proof that simple ingredients can create something hearty and delicious. Its unusual name comes from the sound of the vegetables being “rumbled” (mixed) and “thumped” (mashed).
Historically, Rumbledethumps was a thrifty way for Border families to use garden produce and stretch meals. Potatoes and swede stored well through the winter, while cabbage added bulk and flavour. Similar to colcannon in Ireland or bubble and squeak in England, it stands apart thanks to the Scottish touch of swede and that irresistible cheese topping. Today, it’s still a staple at family tables, especially when paired with sausages, mince, or roast meat.
Why It’s Loved
Rumbledethumps is more than a side dish—it’s a link to Scotland’s Borders heritage. With its buttery mash, earthy swede, and golden cheese crust, it feels timeless and comforting. Whether enjoyed on a cold evening or served at a family gathering, it’s a dish that warms the table and the heart.
Tips & Variations
- Cheese levels: For a lighter version, add cheese only on top rather than mixing it in.
- Greens: Swap cabbage for kale if you prefer a stronger flavour.
- Leftovers: Rumbledethumps is excellent reheated and can be crisped up in an air-fryer at 180°C for 15 minutes.
- Quick version: Use leftover mashed potatoes and greens from a roast dinner—this dish is forgiving and flexible.
Rumbledethumps Recipe
Serves 4 • Prep 20 min • Cook 45 min • Oven 190°C (170°C fan) / 375°F / Gas 5
Ingredients
- 500g floury potatoes, peeled and cut into chunks
- 250g swede (turnip), peeled and cut into chunks
- 250g savoy cabbage or kale, finely shredded
- 1 onion, thinly sliced
- 50g butter
- 75g mature Scottish cheddar, grated
- Salt and black pepper
Method
- Heat the oven to 190°C (170°C fan) / 375°F / Gas 5 and butter an ovenproof dish.
- Boil the potatoes and swede in salted water for 15-20 minutes until tender. Drain well and mash with half the butter.
- Meanwhile, melt the rest of the butter in a frying pan and cook the onion and cabbage for 5-8 minutes until soft.
- Mix the cabbage and onion into the mash and season well.
- Spread the mixture in the dish, scatter the cheese over the top and bake for 20-25 minutes until golden and bubbling.
Tip: leftover mash and greens from a roast work just as well.
Frequently Asked Questions
What is Rumbledethumps made of?
Rumbledethumps is a Scottish dish made from mashed potatoes, swede, and cabbage, baked with a cheese topping. It’s designed to be hearty and filling while making good use of vegetables that store well through winter.
Why is it called Rumbledethumps?
The name describes the cooking process—”rumbled” refers to mixing the vegetables together, and “thumped” refers to mashing them. It’s a playful name that captures what you’re actually doing to make the dish.
Can you substitute ingredients in Rumbledethumps?
Yes, it’s a flexible dish—you can swap cabbage for kale for a stronger flavor, add cheese only on top for a lighter version, or use leftover mashed potatoes and greens from a roast dinner. The dish is forgiving and works with what you have.
How do you reheat Rumbledethumps leftovers?
Reheat it in an air-fryer at 180°C for 15 minutes to crisp it up and restore its texture. This works much better than microwaving and brings the cheese topping back to life.