Browsing the local delights of the Naturladen (organic shop) in my home town in Austria, I picked up a bag of Grünkern. The greenish grains looked pretty unique on the shelf! Grünkern are unripe spelt kernels harvested predominantly in Southern Germany. Although mainly used for soups and vegetarian burgers, I wanted to incorporate some of this unique grain in a sourdough Grünkern bread.
What is Grünkern?
Grünkern (German for ‘green kernel’) is spelt that has been harvested when half ripe (usually end of July) and then dried. Historically, harvesting spelt so early and before reaching full ripeness was a reaction to periods of adverse weather, which destroyed crops and resulted in poor harvests. It was a way to prevent crop failure.
The grains are harvested when the starch isn’t fully developed and the kernels are still soft and juicy at about 50% moisture content. Grains are dried over a beechwood fire or in hot air dryers – right down to a moisture content of 13%. Once dried, the outer husk is removed. Have a look at gruenkern.de for more information around the harvesting process, then and now.
The dried kernels smell aromatic and a little bit like fresh hay. The aroma remains uniquely pleasant and hearty when cooked with water, so it became a tradition to harvest a portion of the spelt as Grünkern. Grünkern doesn’t tend to be made into a flour; instead it is available as whole grains or chopped grains.
How Grünkern was made
Where to buy Grünkern in the UK?
I’ve only seen Grünkern on Amazon in the UK.
Grünkern bread recipe
This recipe uses Grünkern as whole kernels which are integrated into a wholemeal spelt sourdough loaf. Adding black treacle enhances the flavours, but you can easily leave out the treacle if you would like a purer version of spelt bread and a purer Grünkern flavour.
For the sourdough
- 25g spelt sourdough starter
- 220g wholemeal spelt flour
- 220g water
For the Grünkern soaker
- 175g Grünkern
- 350g water
For the main dough
- 220g spelt flour
- 50g water
- 14g salt
- 1 tbsp malt extract
How to bake Grünkern bread
- Prepare the sourdough by combining your spelt starter with the spelt flour and water. Mix well in a bowl, cover with a lid and leave to stand at room temperature for 16 – 24 hours.
- Combine Grünkern and water in a pan, cover and leave to soak overnight.
- Drain the Grünkern and bring to a boil in a pan with 350g water. Simmer over a low heat for about 15 minutes. Drain any remaining water.
- In a large bowl, combine 440g of the sourdough (the remaining 25g go back into the fridge for your next bake) with the main dough ingredients.
- Form a dough and knead for 10 minutes.
- Add the Grünkern to the dough and knead until evenly distributed.
- Place the dough back into the bowl, cover and leave to rest for 1 hour at room temperature.
- Prepare a baking tin (23 x 11 x 9.5 cm) by lightly oiling it. I use a silicone brush to do that.
- Place the dough into the tin and prove for 2 – 4 hours depending on the temperature in your room. The dough should rise visibly, filling the tin to the top.
- Preheat the oven to 250°C.
- Place the baking tin on the second layer from bottom up and bake for 15 minutes, then bake for a further 25 minutes at 180°C and a final 10 minutes outside the tin at 180°C.
- Cool on a wire rack.