Caramelized Onion and Gruyère Galette
A rustic free-form tart featuring sweet caramelized onions and melted Gruyère cheese in a buttery crust. This french-inspired vegetarian ready in about 85 minutes pairs all-purpose flour, unsalted butter, cold and cubed, ice water for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 320 calories and feeds 4, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.
Ingredients
- 1 1/4 cups all-purpose flour
- 6 tbsp unsalted butter, cold and cubed
- 3-4 tbsp ice water
- 2 medium large onions, thinly sliced
- 2 tbsp olive oil
- 1 tsp salt
- 1/2 tsp black pepper
- 1 tsp fresh thyme leaves
- 1 cup Gruyère cheese, shredded
- 1 egg, beaten (for egg wash)
Instructions
- Step 1: To make the dough, combine 1 1/4 cups all-purpose flour and 6 tbsp cold cubed unsalted butter in a bowl. Use your fingers or a pastry cutter to work the butter into the flour until mixture resembles coarse crumbs.
- Step 2: Add 3-4 tbsp ice water, 1 tbsp at a time, mixing gently until the dough comes together. Form into a disk, wrap in plastic, and chill for 30 minutes.
- Step 3: Meanwhile, heat 2 tbsp olive oil in a skillet over medium heat. Add 2 thinly sliced medium onions and 1 tsp salt. Cook slowly, stirring occasionally, for 25-30 minutes until onions are deeply golden and caramelized.
- Step 4: Remove onions from heat and season with 1/2 tsp black pepper and 1 tsp fresh thyme leaves. Let cool.
- Step 5: Preheat oven to 400°F (200°C). On a lightly floured surface, roll out chilled dough into a 12-inch circle. Transfer to a baking sheet lined with parchment paper.
- Step 6: Spread the caramelized onions evenly over the dough, leaving a 2-inch border. Sprinkle 1 cup shredded Gruyère cheese over the onions.
- Step 7: Fold the edges of the dough inward over the filling, pleating as needed. Brush the dough edges with 1 beaten egg.
- Step 8: Bake for 30-35 minutes until the crust is golden brown and cheese is melted and bubbly. Let cool 5 minutes before slicing and serving.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does Caramelized Onion and Gruyère Galette take to make?
Total time is about 85 minutes (45 min prep + 40 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.
How do I store leftover Caramelized Onion and Gruyère Galette?
Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep all-purpose flour from drying out.
Can I substitute ingredients in Caramelized Onion and Gruyère Galette?
Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.
How do I scale Caramelized Onion and Gruyère Galette for a different number of people?
The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.
What goes well with Caramelized Onion and Gruyère Galette?
French vegetarian like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.
