French-Inspired Mushroom and Gruyère Cheese Tart
A savory tart featuring sautéed mushrooms and melted Gruyère cheese in a flaky pastry shell, evoking the elegance of French bistro fare. This french-inspired vegetarian (vegetarian) ready in about 45 minutes layers sliced button mushrooms, unsalted butter, small, finely chopped shallots into a dessert worth slowing down for — great for weekend baking, holiday tables, or any time you want a sweet payoff at the end of a meal. Each serving lands at about 320 calories and feeds 6, so it slots into a weekend bake or a special-occasion dessert tray. 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 sheet (8 oz), thawed store-bought puff pastry sheet
- 8 oz, sliced button mushrooms
- 2 tbsp unsalted butter
- 2 small, finely chopped shallots
- 1 tsp fresh thyme leaves
- 1 cup shredded Gruyère cheese
- 1/2 tsp salt
- 1/4 tsp black pepper
- 1 large, beaten for egg wash egg
Instructions
- Step 1: Preheat oven to 400°F. Roll out 1 sheet (8 oz) thawed puff pastry on a floured surface to fit a 9-inch tart pan, pressing into the edges and trimming excess.
- Step 2: Melt 2 tbsp unsalted butter in a skillet over medium heat. Add 2 finely chopped shallots and sauté for 2 minutes until translucent.
- Step 3: Add 8 oz sliced button mushrooms and 1 tsp fresh thyme leaves to the skillet. Cook for 6-8 minutes until mushrooms release moisture and become golden, seasoning with 1/2 tsp salt and 1/4 tsp black pepper.
- Step 4: Spread the sautéed mushroom mixture evenly over the prepared pastry shell. Sprinkle 1 cup shredded Gruyère cheese evenly on top.
- Step 5: Brush the edges of the pastry with 1 beaten large egg for a golden finish. Bake for 20-25 minutes until the pastry is puffed and golden and cheese is melted and bubbling. Let cool for 5 minutes before slicing and serving.
Equipment for this recipe
Top-rated tools to make this recipe successfully.
Frequently asked questions
How long does French-Inspired Mushroom and Gruyère Cheese Tart take to make?
Total time is about 45 minutes (15 min prep + 30 min cook). Most home bakers find this fits a weekend afternoon; chill or store as the recipe directs before serving.
How do I store leftover French-Inspired Mushroom and Gruyère Cheese Tart?
Cool fully before storing. Most baked desserts keep at room temperature in an airtight container for 2–3 days, or in the fridge for up to 5 days. Cream- or custard-based desserts must go in the fridge within 2 hours; reheat gently or serve cold per the recipe.
Can I substitute ingredients in French-Inspired Mushroom and Gruyère Cheese Tart?
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 French-Inspired Mushroom and Gruyère Cheese Tart for a different number of people?
The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). 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.
Is French-Inspired Mushroom and Gruyère Cheese Tart vegetarian?
Yes — this recipe is tagged vegetarian based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.
