Zwiebelkuchen (German Onion Cake) 🧅🥓🇩🇪

Zwiebelkuchen is a beloved German savory onion tart made with a soft yeast dough or pastry crust, topped with sweet caramelized onions, smoky bacon, eggs, and a creamy sour cream mixture. It’s especially popular in southern Germany during Federweisser (young wine) season.

Prep Time: 30 minutes
Rising Time: 45–60 minutes (if using yeast dough)
Bake Time: 40–45 minutes
Total Time: About 2 hours
Servings: 8 slices

Ingredients

Dough

• 2½ cups all-purpose flour
• 2¼ tsp active dry yeast
• 1 tsp sugar
• ½ tsp salt
• ¾ cup warm milk
• 3 tbsp butter, melted
• 1 egg

Onion Topping

• 2½ lbs (1.1 kg) yellow onions, thinly sliced
• 6 oz (170 g) bacon or smoked pork belly, diced
• 2 tbsp butter
• 1 tsp salt
• 1 tsp caraway seeds (optional, traditional)

Cream Mixture

• 3 large eggs
• 1 cup sour cream
• ½ cup heavy cream
• ½ tsp black pepper
• ¼ tsp nutmeg
• ½ cup shredded cheese (optional)

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Instructions

1. Make the Dough

1. Mix warm milk, yeast, and sugar. Let sit for 5–10 minutes until foamy.
2. Add flour, salt, butter, and egg.
3. Knead until smooth, about 5–8 minutes.
4. Cover and let rise for 45–60 minutes until doubled.

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2. Prepare the Onion Topping

1. Cook bacon in a large skillet until lightly crisp.
2. Add butter and onions.
3. Cook over medium-low heat for 20–30 minutes, stirring often, until soft and golden.
4. Season with salt, pepper, and caraway seeds.
5. Cool slightly.

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3. Prepare the Filling

Whisk together:

• Eggs
• Sour cream
• Heavy cream
• Nutmeg
• Pepper

Fold in the cooled onion mixture.

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4. Assemble

1. Preheat oven to 375°F (190°C).
2. Roll dough into a greased 9×13-inch pan or round tart pan.
3. Spread onion filling evenly over the dough.
4. Sprinkle with cheese if using.

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5. Bake

Bake for 40–45 minutes until:

• The top is golden
• The filling is set
• The crust is cooked through

Let rest for 10 minutes before slicing.

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Variations

🥓 Classic Swabian Style

Use plenty of onions, bacon, and caraway seeds.

🧀 Cheese Zwiebelkuchen

Add:

• Gruyère
• Emmental
• Swiss cheese

🌿 Vegetarian Version

Replace bacon with:

• Mushrooms
• Leeks
• Roasted peppers

🥔 Potato Onion Cake

Add thin potato slices for a heartier version.

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Serving Suggestions

Traditionally served with:

• Young white wine (Federweisser)
• Green salad
• Pickles
• German beer

Tips for the Best Zwiebelkuchen

✅ Cook onions slowly—this brings out their natural sweetness.
✅ Cool the onion mixture before adding eggs to prevent curdling.
✅ Caraway seeds add the classic German flavor.
✅ It tastes even better slightly warm or at room temperature.

Zwiebelkuchen is a comforting German classic: a perfect balance of sweet onions, smoky bacon, creamy filling, and buttery crust. 🧅✨