There’s a rye bread that’s been baked underground in geothermal springs in Iceland for generations. It’s dark, dense, deliciously sweet and it’s called Hverabrauð or Thunder Bread.
I went on a whirlwind, 24 hour visit, to Iceland to discover how Thunder Bread is made and to catch a behind-the-scenes glimpse of the Celebrity Cruises and Waitrose ‘Taste of Travel’ food and travel series which is filmed with Rosie’s Deli Cafe owner and presenter Rosie Lovell.
On the road in Iceland
On the Road in Iceland
We set out from Reykjavik at early doors, driving through some stunning Icelandic scenery on our journey. We had a very quick stop at Þingvellir (pronounced Thingvellir) National Park, home to the world’s oldest parliament, where we were able to check out the amazing views.
We walked through one of the fault lines where the earth’s tectonic plates of the Mid-Atlantic Ridge have shifted. It was good to see the Icelandic scenery in the summer – last time I stood and looked at this view it was early February with a very wintery looking scene and a vicious wind.
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Þingvellir (Thingvellir) National Park
Laugarvatn Fontana
We arrived at Laugarvatn Fontana and met Sigurdur Hilmarsson (Siggi), manager and chef. Siggi would be teaching Rosie how to make Icelandic Thunder Bread from a recipe handed down by his grandmother.
Laugarvatn Fontana is a geothermal spa with pools, saunas and a restaurant with a strong Icelandic design vibe. It sits on the edge of Lake Laugarvatn which laps onto a black volcanic shoreline and has three geothermal springs. The springs provide energy for the entire village and the spring at Fontana would be used for cooking our Thunder Bread.
Read more: Tips for Visiting Reykjavik | What to Eat & Drink in Iceland | Touring Iceland’s Golden Circle
Laugarvatn Lake, Iceland
What is Thunder Bread
Thunder Bread is just a nickname, it’s actually called Hverabrauð (hot-spring bread), or rugbrauð and is a type of rye bread. It’s steam-cooked underground in a geothermal spring. Every Icelandic family’s recipe for Thunder Bread is slightly different with ‘more of this’ and ‘less of that’ and, of course, each family thinks theirs is the best. Thunder Bread is a year-round essential food in Iceland eaten with smoked trout, salmon, herring or just plain butter. As Siggi says ‘It’s pure Iceland’.
Rosie and Siggi making thunder bread
Recipe for Thunder Bread
Icelandic Thunder Bread or Rye Bread
Ingredients
- 320 grams rye flour
- 85 grams flour
- 200 grams sugar
- 2 tsp baking powder
- 1/4 tsp salt
- 500 ml milk
Instructions
- Mix together all the dry ingredients in a medium bowl. Add the milk and mix together. The dough will be very wet.Grease a metal pot (with a lid) so the bread won’t stick when it’s cooked. If, like me, you don't have a geothermal spring in your garden(!) Siggi suggests you bake in the oven at 120 degrees Celsius (with the lid on) for five and a half hours, or until bread is cooked in the middle. You could also cook in a slow cooker.
To convert to cups measurement use this converter.
Burying the Thunder Bread
We went outside to the lakeside to watch Siggi bury the bread in the geothermal spring. We could see steaming bubbles exploding in the black volcanic sand by the water’s edge and smell the faint, eggy smell of sulphur in the air.
First, Siggi dug up the previous day’s thunder bread and cooled off the hot pot in the lake. Next, he buried the freshly made pots of thunder dough in the geothermal spring.
Burying Thunder Bread
The thunder bread is taken out of its pot and neatly sliced ready to eat…
Thunder bread with Rosie and Siggi
What does Thunder Bread Taste Like?
The Thunder Bread was delicious! It was very dense and almost cake-like. I ate it, still warm, without any topping – it was moist and had a faint caramel-like taste. Really yummy. If I had a thermal spring in our garden at home I’d be baking it regularly!
Icelandic Thunder bread
Why is Hverabrauð called Thunder Bread?
Apparently if you eat too much Hverabrauð you’ll experience a ‘gas situation’! Since we were getting on a flight that afternoon I only had two slices so can’t confirm whether this is farty fact or farty fiction.
Filming with Rosie
It was fascinating to be part of a film shoot and see the painstaking procedure that goes into making just a short 2-3 minute film. The crew, Rosie and Siggi patiently filmed over and over until the producer was happy with the footage and sound.
I can’t even imagine the amount of work that goes into editing everything to produce the final film. The crew have worked on a number of ‘A Taste of Travel’ videos with the Celebrity Cruises and Waitrose partnership. ‘How to make ‘Manti’ in Istanbul and what goes into producing the best gelato in Florence.
Filming in Iceland
Rosie Lovell
We had a chance to have a quick chat with Rosie Lovell, cookery writer, cafe/deli owner and presenter before filming started. After leaving university, Rosie went to Glastonbury, came home and straight away opened Rosie’s Deli Café in Brixton – she’s never looked back. She recently opened a second Deli Cafe in Peckham – ‘I’ll only in open in places I love, she says – I’m too emotional!’ She’s very hands-on and splits her time between the two cafes cooking up breakfasts, brunches, sandwiches and cakes.
Rosie’s written two cookery books which, she says, charter her age. Her first book, Spooning with Rosie, has simple, student, comfort food. The second, Supper with Rosie, is a bit more grown up. When asked about her food/travel wishlist there was barely a hesitation. ‘Tokyo because it’s so immersive and different; overwhelming, exciting and fundamentally foreign.’
So where does Rosie head when she’s going out for a meal? Now that we have a son it’s more neighbourhood – easy, seasonal, accessible and appealing. All I want is ‘a really flipping nice supper!’ I couldn’t agree more.
Have you come across any unusual foods on your travels – tell all, what and where in the comments below…
Many thanks to Celebrity Cruises for inviting me along to this big Icelandic bake off!
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The recipe calls for it to cook at 120°c. Is this with over/under heating or fan-heating?
Any of these, although I imagine a fan oven would be more likely to replicate the heat of a geothermal spring in that it would totally envelope the pot in heat. Let me know how you get on…
We tried this bread while in Iceland. It was fantastic. Really enjoyed watching them bury a new bread, dig up a baked o ne and eating it. In the recipe it calls for 200 GRANS of sugar. Is this correct? What is a gran?
The bread is delicious! Thanks for pointing that out – it’s just a typo but I’ve amended it to grams now.
Can anyone help with the conversions for this? grams to cups? Is this bread flour?
Hi, I’ve added a link to a converter which I hope helps. Two types of flour are used in the recipe; rye bread and ordinary flour.
I would like to share my complete disappointment with the “making bread experience in the fontana”. Nowhere I’ve felt more scammed than there. The called “tour” took 7 min. I had to pay 3.000 isk for me and my boyfriend to hear no story, to see no bread making and to eat two peaces of bread. The other half of the bread was taken away to the kitchen area (probably to sell in the morning). The “tour” is literally – here is the hot spring, there is the lake…if I wanted to hear description of things I could have done it myself. The bread is delicious, but I don’t think it cost 1.500 isk a piece.
Did you go at the tour time? (11.30 or 2.30). That sounds shockingly expensive for two slices of bread and not to see the bread dug up out of the hot spring or the
description of how it’s made. Sorry to hear you didn’t have a good experience.
What a fascinating experience this trip must have been Suzanne – I’m just trying to get my head around what that dense, caramel – like bread must taste like as it sounds so intriguing! I too would love to have a go at baking it but there’s a distinct lack of hot springs my way ? I live in South East London so I’m keen to try out Rosie ‘ s deli in Peckham – thanks for the recommendation!
It was definitely a unique experience. If you’re lucky Rosie may even cook some thunder bread up some time – do let me know if you go to her delicafe, I’d love to hear about it.
Thunderbread! Interesting. It’s like the pig roasts – sort of – made in Hawaii, where the pig is baked underground. Looks really delish 🙂
I’ve not heard about underground pig roasts before – I’d love to visit Hawaii though and discover more!
I’ve always wanted to visit Iceland and that Thunder Bread sounds like a lot of fun. Glad to hear you didn’t experience a gas situation!
Me too!!
This is so interesting. I spent a week in Iceland but didn’t hear of Thunder Bread. I’ll clearly have to go back to try some!
You need to go back and try some – it’s delicious and very entertaining!
This is so interesting, I love rye bread! The way you’ve described it it sounds delicious, that’s a lot of sugar and I guess it caramelises down, wow, how yummy!
It does look a bit cakey, I really want to try it! I wonder if it could be semi-recreated in an Aga, ooo!
Now you’re not telling me you’ve got an aga in your camper van are you!!
What a fascinating experience. I’d love to taste this bread still warm from cooking in a geothermal spring. I some how can’t imagine it tastes as good cooked in the oven.
The whole experience of seeing it dug from the ground, cooled in the lake and cut up by the water’s edge really added
to the experience – and the flavour!