German Onion Pie (Printable)

Savory caramelized onions, smoky bacon, and creamy custard on crisp pastry crust.

# What You’ll Need:

→ Pastry

01 - 2 cups all-purpose flour
02 - 1/2 teaspoon salt
03 - 1/2 cup unsalted butter, cold, cubed
04 - 1 large egg
05 - 2-3 tablespoons cold water

→ Filling

06 - 2 tablespoons unsalted butter
07 - 1 lb yellow onions, thinly sliced
08 - 5 oz thick-cut bacon, diced
09 - 1/2 teaspoon caraway seeds
10 - 1 teaspoon salt
11 - 1/2 teaspoon ground black pepper
12 - 1/4 teaspoon freshly grated nutmeg

→ Custard

13 - 1 cup heavy cream
14 - 1/2 cup whole milk
15 - 3 large eggs
16 - 1/2 cup grated Emmental or Gruyère cheese

# How To Make It:

01 - Combine flour and salt in a large bowl. Cut in cold butter until mixture resembles coarse crumbs. Add egg and enough cold water to form a soft dough. Shape into a disk, wrap, and refrigerate for 30 minutes.
02 - Preheat oven to 375°F. Roll out dough on floured surface to fit a 9-inch tart or pie pan. Press into pan, trim edges, and prick base with fork. Chill until ready to fill.
03 - Melt butter in large skillet over medium heat. Add bacon and cook until just crisp. Remove and set aside. Add onions to pan and cook gently, stirring often, for 15-20 minutes until golden and very soft. Stir in caraway seeds, salt, pepper, and nutmeg. Remove from heat and mix in bacon.
04 - Whisk together cream, milk, eggs, and cheese until smooth in a bowl.
05 - Spread onion mixture evenly over prepared crust. Pour custard over the onions.
06 - Bake for 40-45 minutes until filling is set and lightly golden. Let cool for 10 minutes before slicing.
07 - Serve warm or at room temperature with a crisp German white wine like Riesling or a green salad on the side.

# Expert Advice:

01 -
  • The combination of slow cooked onions and smoky bacon creates an incredible depth of flavor that feels like it cooked all day
  • This tart manages to be both elegant enough for dinner guests and cozy enough for a quiet Tuesday night at home
02 -
  • The most common mistake is undercooking the onions, they need to be fully softened and golden to develop that deep sweet flavor
  • Cold pastry dough is crucial, so if your kitchen is warm, chill the tart pan again before adding the filling
03 -
  • Grate your own cheese instead of buying pre grated, it melts so much better into the custard
  • Let the tart cool for at least 10 minutes before slicing, otherwise the custard may run