Teisen Nionod — The Savoury Welsh Onion Cake

Layered with simplicity and love, Teisen Nionod is a traditional Welsh dish that transforms pantry staples into something extraordinary. 

Think tender potatoes, sweet onions, and lashings of butter — baked slowly until golden and crisp on the outside, soft and melting inside.

Rooted in the culinary traditions of South Wales, Teisen Nionod is both a side dish and a star in its own right — one of those quiet heroes that deserves far more fame.

Humble Ingredients, Hearty Results

This dish calls for just a few components:

Thinly sliced potatoes

Sliced onions

Butter (and lots of it!)

Salt and pepper

Sometimes a little stock or bacon fat for extra flavour

Layered and baked slowly, the flavours mingle and intensify, giving you crisp edges and creamy centres. It’s a dish that rewards patience and celebrates the beauty of Welsh produce.

Regional Twists

While Teisen Nionod is most commonly made in Glamorgan and surrounding counties, you’ll find a few variations:

Carmarthenshire: Adds a splash of chicken or vegetable stock for extra richness

Cardiganshire: Uses dripping or lard instead of butter for a deeper flavour

Modern takes: Add leeks, cheese (like Caerphilly or cheddar), or even mustard

Perfect Pairings

Teisen Nionod is a perfect partner to:

Roast lamb or pork

Faggots and onion gravy

Laverbread and bacon

Or simply served with buttered cabbage and a poached egg for a vegetarian supper

Recipe: Teisen Nionod (Welsh Onion Cake)

Ingredients:

4 large floury potatoes (e.g., Maris Piper or King Edward)

2 large onions, thinly sliced

75g unsalted butter, melted

Salt and freshly ground black pepper

Optional: 100ml stock or 50g grated Caerphilly cheese

Method:

Preheat the oven to 180°C (160°C fan) / 350°F / Gas Mark 4.

Peel the potatoes and slice them very thinly (a mandoline helps).

Grease a round baking dish and layer potatoes and onions alternately.

Season each layer with salt, pepper, and a drizzle of butter.

Pour over any remaining butter (and stock if using).

Cover with foil and bake for 45 minutes.

Uncover and bake a further 30 minutes until golden and crisp on top.

Rest for 5–10 minutes before serving in generous wedges.

A Taste of Hearth and Home

Teisen Nionod is proof that the most soul-satisfying dishes are often the simplest. It brings together the frugality of Welsh cooking and the indulgence of comfort food — a tray of golden warmth that belongs on every table.

Coming next: Welsh Griddle Bread — A Pan-Baked Heritage Loaf