Zwibelkuchen (Onion Cake)
- 1 lb 8oz / 600g flour
- 5 tbsp / 75g butter, melted
- 1 egg
- 1 packet of active dry yeast. (See notes for my sourdough version)
- 1 tsp salt
- 1 tsp sugar
- 1/2 cup / 120ml water
- 1/2 cup / 120ml milk
- 2 tbsp butter for the pans
- For the topping
- 3 lbs/ 1.5kg onions, sliced or coarsely chopped
- 1 tbsp butter
- 1 tbsp vegetable oil
- 1 tsp salt
- 2 tsp caraway seeds
- 1/2 - 1 tsp freshly ground pepper
- 1/2 cup dry white wine
- 1 cup / 250ml heavy whipping cream
- 1/2 cup / 125ml sour cream
- 5 eggs
- 4 oz / 125g bacon, diced
- 4 stalks of green onions, chopped
- 1/2 cup / 125ml milk
- 1/2 tsp white pepper, freshly ground
- 1/2 tsp salt
- 1/4 tsp nutmeg, freshly grated
- pinch of cayenne pepper
- 2 tbsp parsley, chopped
Dough for the crust
Dissolve yeast in half of the milk.
Combine flour, yeast (or sourdough starter), 1 egg, sugar, salt, milk, milk with yeast, water and melted butter. Knead until the dough is smooth and elastic.
Form a ball, coat thinly with oil, let rise in a warm place until volume has about doubled.
In the meanwhile, heat butter and oil in a large heavy pan over high heat. Add caraway seeds. Add onions, 1 tsp salt and 1 tsp of pepper. Cook for about 15 minutes, stirring frequently and making sure the onions don't brown (turn down heat if necessary).
Add wine, cook for another 10 minutes until the liquid has evaporated. Set aside.
Whisk together cream, sour cream, eggs, pepper, nutmeg and salt. Add cayenne pepper and stir in chopped parsley. Set aside.
The Onion Cakes
Generously butter 2 large pizza pans, 1 tbsp of butter per pan.
Preheat oven to 375°F / 190°C
Divide dough into two equal parts. Stretch or roll out each part and put on a pizza pan. Spray with a bit of water or cover with damp cloth and let rise for another 15 minutes.
Top each pan with the onions, pour half of the egg-cream mixture on top and add the green onions and bacon.
Bake for ca. 30 minutes until the crust is golden brown and the egg-mixture has set. (It is easiest to bake both pans at the same time in an air circulation oven, alternatively, swap the pans from time to time between upper and lower rack.
In a mixing bowl combine 4½ oz / 140g all-purpose flour with 4½ fl oz / 140ml water. Add 1 tbsp of sourdough starter culture. Cover and let stand overnight in a not too cold place until very bubbly.
Follow the recipe using 1 lb ½ oz / 460g of flour, no water (only milk) and omitting the yeast.
Omit the the bacon or replace it by 2 additional chopped stalks of onion greens.