Chef Klaus
Ahle Wurst
North Hesse's old sausage is cured, not cooked: coarse pork, pepper, garlic, and cold weeks in a chamber until the slice turns firm enough for rye and cider.
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Zwiebelkuchen
Created by
The autumn onion tart of the German wine table: soft onions, Schmand, egg, and a thin yeast base, baked just until set and eaten with the year's new drink.
Breakfast & Brunch
German
Outdoor Dining
Make Ahead
Comfort Food
35 min
Active Time
55 min cook•2 hr 10 min total
Yield8 servings
Zwiebelkuchen belongs to autumn, when the onions are stored, the wine harvest is in, and the first young drink comes to the table. In Württemberg and Baden I expect a yeast dough, thin but not mean, with a soft onion filling bound with egg and Schmand, sour cream with more backbone. In the Palatinate and Franconia you'll see the argument start: shortcrust or yeast, bacon or none, caraway or no caraway. Im Norden anders, im Süden anders. Here the south and southwest speak loudest.
The dish works or fails in the onion pan. Sweat the onions slowly until they slump, turn pale gold, and give up their water, but don't brown them. Browned onions bring harsh sweetness and dry edges, and wet onions make the filling weep into the dough. Runter mit der Temperatur. Das braucht seine Zeit.
I cool the onions before the eggs go in because hot onions scramble the custard before the oven has its say. Then the tart bakes until the middle trembles only a little, not until it is rubber. This is food for a table outside while the weather still allows it, or for breakfast the next day if nobody finished the tray. Schön ist, was schmeckt.
Zwiebelkuchen is tied to the wine-growing regions of southwest Germany, especially Württemberg, Baden, the Palatinate, Rheinhessen, and Franconia, where it is traditionally eaten in early autumn with Federweißer, the cloudy young fermenting wine of the new harvest. The custom grew out of the harvest calendar rather than a court kitchen: stored onions, fresh dairy, flour, eggs, and often a little Speck made a filling dish while the first wine was still working in the barrel. Regional versions still split over the base, with Swabian and Baden cooks often using yeast dough, while some Palatine and Franconian tables prefer a richer shortcrust.
The technique, the tradition, and the story behind every dish.
Discover Culinary ExplorerIngredients
plain flour
Quantity
300g
instant yeast or fresh yeast
Quantity
7g instant / 20g fresh
milk
Quantity
150ml
lukewarm
sugar
Quantity
1 teaspoon
butter
Quantity
50g
softened
fine salt
Quantity
1 teaspoon
yellow onions
Quantity
1kg
thinly sliced
smoked bacon or Speck
Quantity
150g
diced
butter or lard
Quantity
2 tablespoons
caraway seeds
Quantity
1 teaspoon
lightly crushed
eggs
Quantity
3 large
Schmand or full-fat sour cream
Quantity
250g
double cream
Quantity
100ml
black pepper
Quantity
to taste
nutmeg
Quantity
to taste
freshly grated
salt
Quantity
to taste
| Ingredient | Quantity |
|---|---|
| plain flour | 300g |
| instant yeast or fresh yeast | 7g instant / 20g fresh |
| milklukewarm | 150ml |
| sugar | 1 teaspoon |
| buttersoftened | 50g |
| fine salt | 1 teaspoon |
| yellow onionsthinly sliced | 1kg |
| smoked bacon or Speckdiced | 150g |
| butter or lard | 2 tablespoons |
| caraway seedslightly crushed | 1 teaspoon |
| eggs | 3 large |
| Schmand or full-fat sour cream | 250g |
| double cream | 100ml |
| black pepper | to taste |
| nutmegfreshly grated | to taste |
| salt | to taste |
Equipment Needed
- •28cm tart tin or small rimmed baking tray
- •Wide heavy frying pan
- •Rolling pin
Instructions
- 1
Make the dough
Mix the lukewarm milk with the yeast and sugar, then work in the flour, soft butter, and salt until you have a smooth dough. Keep the milk warm to the touch, not hot, because heat kills yeast before it can lift the base. Knead for 6 to 8 minutes, cover, and let it rise until doubled, about 1 hour.
- 2
Sweat the onions
Cook the bacon in a wide pan until its fat runs, then add the butter or lard, the sliced onions, caraway, and a pinch of salt. Cook over low heat for 25 to 30 minutes, stirring often, until the onions are soft, glossy, and pale gold. Don't brown them. Brown edges taste sharp in the custard, and onions that still hold water will soak the dough.
- 3
Cool the filling
Spread the onion mixture on a plate or tray and let it cool to warm room temperature. Hot onions start cooking the eggs the moment they meet, and then the filling bakes up grainy instead of tender. Weggeworfen wird nichts: scrape the bacon fat from the pan into the onions, because that is where the smoke and salt are sitting.
- 4
Mix the custard
Whisk the eggs with the Schmand, cream, black pepper, nutmeg, and a careful pinch of salt. Season lightly now because the bacon has already done some work. Stir in the cooled onions so the custard coats them evenly rather than sinking under them.
- 5
Line the tin
Roll the risen dough to fit a greased 28cm tart tin or a small rimmed baking tray, pressing it up the sides. Keep the base thin, because Zwiebelkuchen is about onion and custard, not a pillow of bread. Prick the base lightly with a fork so it rises evenly under the filling.
- 6
Fill and bake
Spread the onion custard over the dough and level it without pressing it flat. Bake at 190C for 35 to 40 minutes, until the edges are golden, the top is lightly spotted, and the centre still has a small wobble. Pull it then. The filling keeps setting as it rests, and overbaking turns egg and cream into a hard slice.
- 7
Rest and serve
Let the tart rest 15 minutes before cutting, because the custard needs that pause to hold a clean wedge. Serve warm, not scorching, with young cider, Federweißer, or a green salad with vinegar enough to cut the onions and bacon.
Chef Tips
- •Use yellow onions, not red onions. Red onions turn muddy in the custard, while yellow onions cook down sweet and pale, which is what this tart wants.
- •Slice the onions evenly. Thick pieces stay wet and sharp while thin ones disappear, and then the filling cooks in patches.
- •Schmand is the right dairy if you can get it. Full-fat sour cream works, but don't use low-fat versions; they split more easily and leave the custard thin.
- •Caraway belongs here if your table likes it. Crush it lightly so it perfumes the onions instead of sitting on top like hard little seeds.
Advance Preparation
- •Sweat the onions and bacon up to 2 days ahead, cool them fully, and refrigerate covered. Bring them back toward room temperature before mixing with the eggs so the custard bakes evenly.
- •The baked Zwiebelkuchen keeps 2 days in the refrigerator. Reheat slices in a low oven until the crust firms again; a microwave makes the dough soft.
- •For serving outdoors, bake it in the morning, let it cool, and carry it in the tin. It cuts better warm or room temperature than straight from the oven.
Frequently Asked Questions
Nutrition Information
1 serving (about 215g)
Calories
510 calories
Total Fat
32 g
Saturated Fat
16 g
Trans Fat
0 g
Unsaturated Fat
15 g
Cholesterol
145 mg
Sodium
800 mg
Total Carbohydrates
44 g
Dietary Fiber
4 g
Sugars
8 g
Protein
12 g
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