Mushroom and Leek Tart with Puff Pastry

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

A delicate tart with flaky puff pastry filled with creamy mushroom and leek mixture, ideal for a quiet terrace lunch. This french-inspired vegetarian (vegetarian) ready in about 60 minutes layers sheet (14 oz) Puff pastry, Mushrooms, medium Leek 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 380 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.

★ 3.1 (14 ratings) Prep: 25 min Cook: 35 min Serves 6 French cuisine 380 cal/serving
Plan a meal with the AI → Shop this recipe on Instacart → Shop equipment ↓

Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F (190°C). Roll 1 sheet puff pastry to a 12x10-inch rectangle on a floured surface and transfer to a parchment-lined baking sheet.
  2. Step 2: Melt 2 tbsp butter in a skillet over medium heat. Cook 2 cups sliced mushrooms and 1 medium sliced leek (white part only) for 10 minutes until tender and liquid evaporated.
  3. Step 3: Sprinkle 2 tbsp all-purpose flour over mushrooms and stir for 1 minute. Gradually whisk in 1/2 cup vegetable broth and 1/4 cup heavy cream, simmering until thickened (3-4 minutes).
  4. Step 4: Stir in 1 tbsp fresh thyme, 1/2 tsp salt, and 1/4 tsp black pepper. Cool slightly.
  5. Step 5: Spread mushroom mixture over puff pastry, leaving a 1-inch border. Fold pastry edges over filling. Brush border with 1 beaten egg.
  6. Step 6: Bake for 28 minutes until golden and filling is bubbling. Rest 10 minutes before slicing.

Equipment for this recipe

Top-rated tools to make this recipe successfully.

More Bakeware & baking tools → Shop all kitchen tools →

Frequently asked questions

How long does Mushroom and Leek Tart with Puff Pastry take to make?

Total time is about 60 minutes (25 min prep + 35 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 Mushroom and Leek Tart with Puff Pastry?

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 Mushroom and Leek Tart with Puff Pastry?

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 Mushroom and Leek Tart with Puff Pastry 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 Mushroom and Leek Tart with Puff Pastry 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.

What others are saying

Related recipes