Savory Mushroom Onion Galette (Printable Version)
Rustic galette filled with caramelized onions, mushrooms, and herbs in a flaky crust, perfect for elegant meals.
# What You'll Need:
→ Crust
01 - 1 1/4 cups all-purpose flour
02 - 1/2 teaspoon salt
03 - 1/2 cup unsalted butter, cold and cubed
04 - 1/4 cup ice water
→ Filling
05 - 2 tablespoons olive oil
06 - 1 tablespoon unsalted butter
07 - 1 large yellow onion, thinly sliced
08 - 2 cloves garlic, minced
09 - 12 ounces cremini or button mushrooms, cleaned and sliced
10 - 1 teaspoon fresh thyme leaves or 1/2 teaspoon dried thyme
11 - 1/2 teaspoon salt
12 - 1/4 teaspoon freshly ground black pepper
13 - 1/4 cup grated Gruyère or Parmesan cheese
14 - 1 tablespoon chopped fresh parsley
→ Assembly
15 - 1 egg, beaten (for egg wash)
16 - Flaky sea salt, for garnish (optional)
# Step-by-Step:
01 - Whisk together flour and salt in a large bowl. Cut in cold butter until mixture resembles coarse crumbs. Gradually add ice water, mixing until dough just comes together. Shape into disk, wrap in plastic, and chill for 30 minutes.
02 - Heat olive oil and butter in a skillet over medium heat. Add sliced onions and cook, stirring occasionally, until golden and caramelized, about 15 minutes.
03 - Add minced garlic and cook 1 minute. Stir in mushrooms, thyme, salt, and pepper. Cook until mushrooms release moisture and begin browning, about 8-10 minutes. Remove from heat and stir in parsley, then let cool slightly.
04 - Preheat oven to 400°F. On floured surface, roll dough into a 12-inch circle. Transfer to parchment-lined baking sheet.
05 - Sprinkle half the grated cheese over center of dough, leaving a 2-inch border. Spread mushroom and onion mixture over cheese and sprinkle with remaining cheese. Fold edges of dough up over filling, pleating as needed. Brush crust with beaten egg.
06 - Bake for 30 to 35 minutes or until crust is golden brown and crisp. Allow to cool slightly before slicing.
07 - Optional: Sprinkle with flaky sea salt and additional parsley before serving.
# Expert Advice:
01 -
- This galette is the perfect blend of rustic charm and elegant flavors—like sharing a secret with your best friend about how simple gourmet can be.
- It quickly became my go-to for impressing guests without hours of fuss; everyone always asks for seconds without knowing how easy it was to make.
02 -
- Chilling the dough is non-negotiable; it prevents shrinking and helps achieve those coveted flaky layers.
- Waiting patiently while the onions caramelize transforms the flavor—rushing this step will cost you depth.
03 -
- Use a mixture of butter and olive oil for the crust to balance flavor and flakiness.
- Cold ingredients and minimal handling is the secret that makes your crust impeccable every time.