Saure Bohnen (Schnippelbohnen)

Ingredients

Equipment Needed

• •Digital kitchen scale
• •Bean slicer or sharp knife
• •Large mixing bowl
• •2 litre fermentation crock or two 1 litre wide-mouth jars
• •Fermentation weights
• •Airlock lids or loose-fitting lids
• •pH strips, optional for longer storage

Instructions

1. 1

   Trim and weigh

   Wash the beans, trim the ends, pull away any strings, and weigh the beans after trimming. The salt follows the cleaned weight, not the market weight, because 2.5 percent salt is the guardrail that lets the right souring take hold without making the beans harsh. Leave out any soft or spotted beans; a bad bean in a closed crock does not improve with time.

2. 2

   Schnippel the beans

   Cut the beans crosswise into thin 5mm pieces, or run them through a bean slicer if you have one. The cut is not decoration. It opens enough surface for salt to pull moisture quickly and for the brine to move through the pile; whole beans trap air and ferment unevenly.

   A bean slicer earns its drawer space here. If you use a knife, work in small handfuls and keep the pieces even, because uneven beans sour and cook unevenly later.
3. 3

   Salt and bruise

   Mix the cut beans with the salt and summer savory in a large bowl, then leave them 30 minutes until they begin to glisten. Knead and press them hard with clean hands for 5 to 8 minutes, until a little brine gathers in the bottom of the bowl. The rest gives the salt time to draw juice; the bruising breaks the bean cells so the brine can do the keeping. No vinegar in the crock. Vinegar makes a quick pickle, and this dish is kept by the sour brine it grows itself.

4. 4

   Pack under brine

   Pack the beans into a clean stoneware crock or wide-mouth jars in small handfuls, pressing each layer down hard before adding the next. Pressing drives out air pockets, and air is where spoilage starts. Pour in the bean brine from the bowl, then add just enough cooled 2.5 percent brine to cover the beans by 2cm. Leave 3cm headspace, set a fermentation weight on top, and make sure no shred floats above the liquid.

   Use glass, stoneware, or food-safe plastic. Not aluminium. Salt and acid will pull a metal taste out of the wrong vessel, and then you have worked for bad beans.
5. 5

   Ferment at room temperature

   Set the crock or jars at 18 to 22C, out of direct sun, for 7 to 10 days. Use an airlock or loosen the lid once a day, because fermentation makes gas and a sealed jar has no manners. The brine should turn cloudy, bubble gently, and smell cleanly sour. If the kitchen is above 24C, runter mit der Temperatur, move the beans somewhere cooler; too much warmth softens them before the sourness has settled.

   If the brine drops below the beans, top it up with 2.5 percent brine. A thin white film can be lifted off, but fuzzy green, black, or pink mold means the batch is gone. Don't rescue rot.
6. 6

   Mature in the cold

   When active bubbling slows and the brine tastes clearly sour, move the beans to a refrigerator or cool cellar for at least 2 more weeks. The cold slows the ferment so the beans keep some bite and the sourness rounds out; eat them too early and they taste mostly of salt and impatience. Keep them submerged the whole time. Das braucht seine Zeit.

7. 7

   Cook before serving

   To serve one pot, lift out about 500g fermented beans and rinse them briefly only if they taste too salty. Cook diced onion and Speck in a little lard until the fat runs clear, then add the beans, potatoes if using, and enough unsalted stock or water to come halfway up. Simmer 12 to 20 minutes, until the beans and potatoes are tender. Fermentation gives sourness and storage; heat makes green beans fit for the table. Finish with black pepper and salt only after tasting, because the brine and bacon have already spoken.

Chef Tips

• •Use young, firm green beans. Old, thick beans keep their strings and leathery skins after fermenting, and no amount of good brine fixes that.
• •Salt by weight: 25g salt for every 1kg trimmed beans. Don't guess. Too little salt invites spoilage, too much salt slows the souring until you have salty beans and nothing else.
• •Summer savory is not garnish here. Bohnenkraut belongs with beans because its peppery edge survives the crock and comes back when the beans are cooked.
• •For longer storage, pH strips are useful. Below pH 4.6 is the safety line for an acid preserve; I like it under 4.0 before it goes to the cold cellar.
• •Cook fermented green beans before eating. They're a winter-pot ingredient, not a raw table pickle. The sour brine keeps them, the simmer finishes them.

Advance Preparation

• •The active work fits into one afternoon. The beans need 7 to 10 days at room temperature, then at least 2 weeks in the cold before they taste like Saure Bohnen rather than salted beans.
• •Store the finished beans cold and fully submerged. Use clean tongs, not fingers, and top up with 2.5 percent brine if the liquid drops.
• •Best used within 3 months in the refrigerator or a very cool cellar. The beans get sharper with time, so rinse lightly before cooking if the brine has become strong.
• •Cooked Saure Bohnen with potatoes and Speck are good made a day ahead. Reheat gently with a splash of water or stock, because the potatoes drink up the sour broth overnight.

Frequently Asked Questions

Nutrition Information

1 serving (about 300g)