Rēwena Bread

Hard·50 min active + 23 hours 10 min resting

Māori sourdough bread leavened with rēwena 'bug' (a fermented potato-and-flour starter). Dense, slightly tangy, with a chewy crust. The iconic pre-yeast Māori bread.

Rēwena bread uses a 'rēwena bug' — a sourdough starter made by fermenting boiled potatoes with flour. Pre-yeast Māori bread tradition adapted from European settler bread-making, distinctly Māori with the potato starter.

Cut a thick slice of rēwena bread — dense, slightly off-white crumb, brown crust, faintly sour aroma. Bite: dense and chewy, with a pleasant tang from the potato fermentation, slightly sweet from the potato starches. The crust is crackly. With butter melting in, this is Māori bread that predates yeast — connecting modern eating to the early colonial-Māori encounter when wheat first arrived.

Wild lactic-acid and yeast bacteria from the potato ferment the starch into the bug. Slow fermentation develops complex tang. Long final rise is needed because the starter is less powerful than commercial yeast.

Variations

With added cinnamon. With added raisins. With added cheese. Whole wheat version. With added kumara. Smaller individual loaves.

On the Palate

Where Rēwena Bread sits in the Maori flavor cloud

Cook to learn

Get a lively, sour-smelling rēwena bug going first — a sleepy starter means a brick, because it does all the leavening on its own.

Techniques

Fermentation Kneading

Ingredients

Serves 8

How it's made

11 steps · 50 min active + 23 hours 10 min waiting

1
27 min
Make the bug (5 days ahead): peel and dice 300 g floury potatoes; boil 25 min until very soft. Mash with the cooking water (about 200 ml).
2
4 min
Mix mashed potato with 200 g flour and 1 tsp sugar into thick paste. Place in a glass jar; cover loosely.
3
4320 min
Let ferment at room temperature 3-5 days, stirring daily, until bubbly and sour-smelling.
Watch out
The bug is ready when it's visibly bubbling and smells tangy-sour, not just wet potato.
4
3 min
Bread day: combine 500 g flour, 1 tsp salt in a bowl; make well in center.
5
2 min
Pour in 250 g rēwena bug + 250-300 ml warm water (just enough to bring dough together).
6
282 min
Knead 10 min into a smooth dough. Cover; rise 4-6 hours (it rises slowly).
Watch out
Dough should feel smooth and springy after kneading, not sticky or slack.
7
62 min
Shape into a round loaf; place on a floured baking sheet. Rise 1 hour.
8
5 min
Preheat oven to 200°C.
9
37 min
Score top with X; bake 35-40 min until deep golden-brown and sounds hollow when tapped.
Watch out
Tap the base — a hollow knock means it's baked through.
10
21 min
Cool 20 min before slicing.
11
1 min
Serve with butter and jam, or alongside boil-up.