Through the last couple years, during various states of lockdown, many people across New Zealand become slightly obsessed with baking bread. As months went on, maybe you experimented a little, adding new ingredients or testing new recipes.
But few of us probably went as far as to bake our bread using geothermal springs.
Yet, at Laugarvatn Fontana in Iceland, that's exactly what they do.
Wander along the edge of Lake Laugarvatn and you may spot people standing beside piles of black sand holding shovels. If you stick around, you’ll see them dig through the sand and boiling water to produce a steel pot, inside of which is a golden-brown, perfectly baked loaf of rye bread.
This is the way it’s done at Laugarvatn Fontana, a bakery that use the heat of local geothermal springs to bake their hverabrauð. Like most rye, it is subtly sweet, dense and, in Iceland, typically enjoyed with butter, hard-boiled eggs and fish.
Hverabrauð literally translates to "hot spring bread", and its exciting nickname "þrumari" means "thunder bread". A fact that becomes less exciting when you realise it refers to the gassiness it can cause if you eat too much.
As the name suggests, the bread was traditionally baked using hot springs, however, most Icelandic bakeries now use modern ovens.
Located between the Eurasian and North America tectonic plates called the Mid-Atlantic Ridge, Laugarvatn Fontana is perfectly positioned for the old-school baking method, which used the boiling spring water under the sand to work like an oven.
The bakery has used the springs for more than a century.
Laugarvatn local and Laugarvatn Fontana general manager Sigurður “Siggi” Rafn Hilmarsson told Atlas Obscura that, at first, he didn’t think hverabrauð was anything special.
Hilmarsson learned the art of hverabrauð from his grandmother and had used her recipe for decades as part of a breakfast he served to guests at a hotel he ran with his wife.
One day, on a whim, he decided to invite guests to join him for his morning walks to collect the loaves. Then, he realised just how unique and exciting this simple bread was.
“In the evening, when I was going to pick up the bread, I went to the hot springs but suddenly remembered that I had put this note up in the lobby,” he said.
"When I went back to the hotel, there were 80 people waiting for me."
Hilmarsson was then inspired to open up the bakery and spa in 2011 and offer rye bread tours for curious visitors.
After keeping his grandmother's recipe a secret for decades, Hilmarsson finally decided to share it so people could make it at home (likely without the volcanic hot springs).
Those who are lucky enough to try a piece may be surprised that no cinnamon or other spices are used, just rye flour, all-purpose flour, baking powder, salt, sugar and cow's milk.
Hilmarsson said it’s the slow, extremely hot cooking process that gives the bread its unique taste and full flavour.