The Lupin Story

Ancient roots

The lupin is one of the oldest cultivated legumes in the world. Around the Mediterranean, Egyptians, Greeks and Romans grew it for thousands of years. They valued its protein-rich seeds, and Roman farmers already knew that lupins left a field more fertile than they found it. Lupine beans are still a familiar snack in Italy, Spain and Portugal today.

On the other side of the world, the peoples of the Andes cultivated their own species, known as tarwi, high in the mountains of what is now Peru and Bolivia.

The bitter problem

Traditional lupins have one major drawback: they are full of bitter alkaloids, the plant's natural defense against being eaten. To make the beans edible, people had to soak and rinse them in water for days. Animals, too, could only eat them in small amounts. For centuries, this kept the lupin a niche crop.

The first boost: feeding the soil

The lupin's first big moment in Germany had nothing to do with food. In the 19th century, farmers in the sandy, nutrient-poor regions of northern Germany discovered that lupins could transform their land. The agronomist Albert Schultz-Lupitz became famous for it on his estate in Lupitz, in the Altmark region: he grew lupins and plowed them back into the ground as "green manure." Poor, sandy fields that had barely produced a harvest became productive farmland.

The secret lies in the roots. Lupins live together with soil bacteria that capture nitrogen from the air and turn it into natural fertilizer. When the plants are worked back into the soil, that nitrogen feeds the next crop.

The bitterness, however, remained. Feeding bitter lupins to livestock was risky, and farmers could not use the plant to its full potential.

A German breakthrough: the sweet lupin

In 1927, the young plant breeder Reinhold von Sengbusch joined the newly founded Kaiser Wilhelm Institute for Breeding Research in Müncheberg, east of Berlin. His mission: find a lupin that wasn't bitter.

He developed a quick chemical test for alkaloids and screened lupin plants one by one, searching for rare natural exceptions. In 1928 he found them: the first low-alkaloid plants of yellow and blue (narrow-leafed) lupin. These became the world's first sweet lupins. His research showed that the sweet trait is inherited, and by the mid-1930s there was enough seed for farmers to plant at scale.

The difference is dramatic. Bitter lupins contain roughly 1–8% alkaloids; modern sweet varieties contain only around 0.01–0.05%. Suddenly lupins could be fed directly to livestock as a protein-rich feed, and later became an ingredient for human food as well. Sengbusch's discovery is still taught as a textbook example of turning a wild plant into a modern crop, and nearly every lupin grown for food today traces back to it.

Lupine coffee: born from necessity

Germany has a long history of coffee alternatives, and most of it was written in times of scarcity. Coffee had to be imported, and whenever Germany was cut off from global markets, people found ways to brew something similar from what grew at home.

1. Napoleonic era (1806–1814)

   Napoleon's Continental Blockade stopped trade with Britain and its colonies. Coffee became scarce and expensive, and roasted chicory root became a common substitute.

2. World War I

   The naval blockade cut Germany off from coffee imports almost entirely. People roasted whatever was available, including barley, rye, chicory, acorns and lupine beans, to make a coffee substitute, known in German as Ersatzkaffee.

3. World War II and the postwar years

   Real coffee was rationed or unavailable for years. Substitute coffee, nicknamed Muckefuck, was part of everyday life in German kitchens.

Roasted lupine beans had a special place among these alternatives. Of all the homegrown options, they come closest to coffee in body and roasted flavor. When imported coffee became affordable again, the substitutes faded, but the knowledge of how to roast and brew lupine beans never fully disappeared.

Why the lupin is a sustainable crop

1. Less water

   Lupins need almost 40% less water to grow.

2. No fertilizer needed

   Thanks to their nitrogen-fixing root bacteria, lupins produce their own nitrogen and don't need synthetic nitrogen fertilizer. They even leave the soil richer for the next crop.

3. Made for organic farming

   Because lupins feed themselves and improve the soil, they fit naturally into organic farming, where synthetic fertilizers are not allowed. Their dense growth also helps shade out weeds.

4. Deep roots

   A long taproot loosens compacted soil and reaches water and nutrients other plants can't.

5. Thrives on poor soil

   Lupins grow well on sandy, light soils where many crops struggle.

6. Good for pollinators

   Their blue, white and purple flower spikes feed bees and other insects in early summer.

7. Grown in a cool climate

   Coffee needs tropical conditions; lupins grow in Northern Europe.

How lupins are grown

In Germany, lupins are sown in spring. By early summer the fields turn blue, white or purple with tall flower spikes. Once the blooms fade, the plants form pods, and the seeds ripen inside them over the summer. Harvest comes in late summer, when the pods are dry. The beans are then cleaned and dried, ready to be processed or roasted.

Naturally GMO-free and gluten-free

GMO-free. The sweet lupin is a product of classic plant breeding, not genetic engineering. Sengbusch found naturally occurring low-alkaloid plants and bred them further, and today's varieties still descend from that work. Genetically modified lupins are not grown commercially, and in the EU, where our lupins grow, no genetically modified lupins are approved for cultivation.

Gluten-free. Gluten is a protein found in wheat, barley and rye. Lupins are legumes, related to peas, beans and peanuts, and contain no gluten. That makes lupine coffee a natural fit for people avoiding gluten, and a notable difference from many traditional coffee substitutes, which were often made from roasted barley or rye.

How lupine coffee tastes and brews

From bean to roast. Raw lupine beans taste mild and slightly nutty, nothing like coffee. The transformation happens in the roaster. Just like with coffee beans, heat triggers browning reactions (the same chemistry that gives bread its crust and coffee its aroma), developing deep, toasty, roasted flavors. The roast level shapes the cup: a medium roast keeps more of the nutty, rounded character, while a dark roast brings out bolder, more intense roasted notes.

The taste. Lupine coffee has the full body and roasted depth people love about coffee, but the experience in the cup is different in one important way: it is smooth. Coffee's sharpness and sour notes come largely from its acids. Lupine beans brew with 0% acidity, so there is no sour edge and no acidic aftertaste. And because the lupin never contained caffeine in the first place, it is naturally caffeine-free. Nothing had to be removed.

How to brew it. Ground lupine beans brew just like ground coffee, in a drip coffee maker, French press, pour-over, percolator or espresso machine. One difference: lupine grounds absorb more water and expand during brewing, so a medium-coarse grind, a little extra room and a touch more water give the best cup.

Cold brew. Lupine coffee makes an especially smooth cold brew. Coffee cold brew is usually steeped for 12–24 hours, partly to keep its acidity low. With lupine beans there is no acid to work around, so a long steep isn't necessary. Brewed and chilled, it keeps for up to two weeks in the fridge.

With milk. Its body holds up well to milk and plant-based alternatives, whether as a latte or frothed like a cappuccino.

The LUPINO™. Lupine coffee topped with frothed milk is what we call a LUPINO™: our name for the lupine version of a cappuccino, served hot. A shot of strong lupine coffee, a generous layer of milk foam, and the same smooth, naturally caffeine-free cup with 0% acidity.

Good to know: lupin and allergies

Like peanuts, soy and other legumes, lupins can cause allergic reactions in some people. In the European Union, lupin is one of the 14 major food allergens that must be declared on food labels. In the US, it is not on the FDA's list of major allergens, but the FDA has advised consumers to be aware of it.

The most important thing to know: people who are allergic to peanuts are more likely to also react to lupin, because the proteins are similar. Lupin allergy can also occur on its own, without a peanut allergy.

Keep the ritual

For many people, coffee was never really about the caffeine. It's the ritual: the smell of a fresh brew, a warm mug in your hands, a quiet moment before the day begins or a slow one after it ends. KEIN KAFFEE keeps that ritual and leaves out what gets in the way.

What people love most is how smooth it is. With 0% caffeine and 0% acidity, there are no jitters, no afternoon crash and no acidic aftertaste, so a cup in the evening or a second one after dinner is never a second thought. Some brew it every morning in place of coffee, some save it for the slow end of the day, and many have made a cold brew or a LUPINO™ their new favorite.