Blue Cheese Tart (With Swiss Cheese) – A Vegetarian Main for Christmas

This homemade blue cheese tart is topped with a layer of Swiss cheese and wrapped in golden puff pastry. This elegant tart is hearty enough to be the star of the meal and pairs beautifully with festive sides.

This recipe makes the perfect vegetarian main course or a side to pair with roast turkey, ham, and so on. The creamy blue cheese combines caramelized onions and a flaky crust—the thin slices of Swiss cheese layer on top to create a golden, bubbly finish.

Ingredients

Here’s what you’ll need to round up:

The pastry

• 1 sheet of puff pastry (store-bought or homemade)
• 1 tbsp flour (for rolling)

The filling

• 2 tbsp olive oil
• 2 medium onions, thinly sliced
• 2 cloves garlic, minced
• 1 cup heavy cream
• 3 large eggs
• 3 oz (85 g) blue cheese, crumbled
• 1 tsp fresh thyme leaves
• 1/2 tsp salt
• 1/4 tsp black pepper

The topping

• 4–5 slices of Swiss cheese
• Fresh thyme sprigs (for garnish, optional)

Instructions

Follow this step-by-step guide to make your own easy, absolutely delicious blue cheese tart.

Prepare the pastry

• • Preheat your oven to 375°F (190°C).
  • Roll out the puff pastry on a lightly floured surface and fit it into a 9-inch tart pan with a removable bottom. Trim the edges and prick the base with a fork to prevent puffing.
  • Blind bake the pastry by lining it with parchment paper and filling it with pie weights or dried beans. Bake for 10 minutes, then remove the weights and bake for another 5 minutes until lightly golden.

Caramelize the onions

• Heat olive oil in a skillet over medium heat. Add sliced onions and cook, stirring occasionally, until golden and caramelized, about 15–20 minutes. Add garlic and cook for another minute. Set aside to cool slightly.

Make the filling

• Whisk together the heavy cream, eggs, blue cheese, thyme, salt, and pepper in a mixing bowl. Stir in the caramelized onions.

Assemble the tart

• • Pour the filling into the pre-baked tart shell, spreading it evenly.
  • Lay the Swiss cheese slices over the top, slightly overlapping to cover the surface.

Bake

• • Place the tart in the oven and bake for 25–30 minutes, or until the filling is set and the Swiss cheese is golden and bubbling.

Serve

• • Let the tart cool for 5–10 minutes before slicing. Garnish with fresh thyme sprigs for a festive touch, and serve warm.

Top Tips

• Choose quality cheese: Use a creamy, blue cheese like our Glacier Wildfire Gorgonzola for a balanced flavor. Go for Swiss cheese that melts beautifully, such as Gruyère or Emmental.
• Customize add-ins: Add sautéed mushrooms or roasted red peppers for extra flavor and texture.
• Prevent a soggy bottom: Ensure your tart crust is fully blind-baked before adding the filling to avoid a soggy base.

How to Store Leftovers

Cover the tart tightly with plastic wrap or place it in an airtight container. Store in the refrigerator for up to 3 days.

Slice the tart and wrap individual pieces in foil, then freeze for up to 1 month. Thaw overnight in the fridge before reheating. Warm slices in the oven at 300°F (150°C) until heated. For a crispy crust, reheat directly on a baking sheet.

Wrapping It Up

Don’t forget to check out our full range of cheese and accompaniments. We have so much to choose from and use as gifts and ingredients.