Pear and Blue Cheese Pie With Caramelized Onions and Walnuts

Quick Recipe Version (TL;DR)

• Yield: 8 slices (1 nine-inch pie)
• Prep Time: 25 minutes
• Cook Time: 60 minutes
• Total Time: 1 hour 25 minutes (plus 10 minutes cooling)

Quick Ingredients

• 1 (9-inch / 23 cm) refrigerated pie crust (or homemade), thawed if frozen
• 2 tbsp (28 g) unsalted butter
• 1 tbsp (15 ml) olive oil
• 2 large yellow onions, thinly sliced (about 600 g)
• 1/2 tsp fine salt, plus more to taste
• 1/4 tsp black pepper
• 2 tsp balsamic vinegar
• 3 medium firm pears (Bosc or Anjou), thinly sliced (about 450 g prepared)
• 2 tsp fresh thyme leaves (or 1 tsp dried thyme)
• 4 oz (113 g) blue cheese, crumbled
• 1/2 cup (60 g) walnuts, toasted and roughly chopped
• 2 large eggs
• 3/4 cup (180 ml) half-and-half
• 1 tsp Dijon mustard
• 1 tsp honey (optional)

Do This

• 1) Heat oven to 400°F (205°C). Fit crust into a 9-inch pie plate; chill 10 minutes.
• 2) Par-bake crust 12–15 minutes; reduce oven to 375°F (190°C).
• 3) Caramelize onions in butter + olive oil 30–35 minutes; season and splash with balsamic.
• 4) Whisk eggs, half-and-half, Dijon, pepper, and honey (if using).
• 5) Layer onions, pear slices, thyme, walnuts, and blue cheese in crust; pour custard over.
• 6) Bake at 375°F (190°C) for 35–40 minutes until set and deeply golden; cool 10 minutes, slice, serve.

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Why You’ll Love This Recipe

• Perfect sweet-savory balance: juicy pears, jammy onions, and tangy blue cheese.
• Looks dinner-party impressive, but uses straightforward home-cook steps.
• A crisp crust and creamy filling make every slice feel special.
• Great warm, at room temperature, and excellent as leftovers.

Grocery List

• Produce: 2 large yellow onions, 3 medium firm pears (Bosc or Anjou), fresh thyme (optional but recommended)
• Dairy: unsalted butter, blue cheese, half-and-half, 2 large eggs
• Pantry: 1 pie crust, olive oil, balsamic vinegar, Dijon mustard, walnuts, fine salt, black pepper, honey (optional)

Full Ingredients

Crust

• 1 (9-inch / 23 cm) refrigerated pie crust (about 230–260 g), thawed if frozen
• 1 tbsp all-purpose flour, for dusting (optional, for rolling)

Caramelized Onion Layer

• 2 tbsp (28 g) unsalted butter
• 1 tbsp (15 ml) olive oil
• 2 large yellow onions, thinly sliced (about 600 g)
• 1/2 tsp fine salt
• 1/4 tsp freshly ground black pepper
• 2 tsp balsamic vinegar

Pear, Blue Cheese & Walnut Filling

• 3 medium firm pears (Bosc or Anjou), halved, cored, and thinly sliced to 1/8-inch (3 mm) (about 450 g prepared)
• 2 tsp fresh thyme leaves (or 1 tsp dried thyme)
• 4 oz (113 g) blue cheese, crumbled
• 1/2 cup (60 g) walnuts, toasted and roughly chopped

Custard (Binder)

• 2 large eggs
• 3/4 cup (180 ml) half-and-half
• 1 tsp Dijon mustard
• 1 tsp honey (optional, for extra sweet-savory contrast)
• 1/4 tsp black pepper
• 1/8 tsp fine salt (optional; blue cheese can be salty)

Step-by-Step Instructions

Step 1: Prep the crust and preheat the oven

Place a rack in the lower third of your oven and preheat to 400°F (205°C).

Fit the pie crust into a 9-inch (23 cm) pie plate, gently pressing it into the corners without stretching. Trim excess dough to about a 1/2-inch overhang, then tuck and crimp. Prick the bottom all over with a fork. Chill the crust in the refrigerator for 10 minutes while the oven finishes heating (this helps prevent shrinkage).

Step 2: Par-bake for a crisp bottom

Line the chilled crust with parchment paper and fill with pie weights or dry beans/rice. Bake at 400°F (205°C) for 12 minutes.

Carefully lift out the parchment and weights, then bake 3 minutes more to dry the bottom slightly. Set aside to cool while you prepare the filling.

Reduce oven temperature to 375°F (190°C).

Step 3: Caramelize the onions until jammy

In a large skillet over medium heat, melt 2 tbsp butter with 1 tbsp olive oil. Add the sliced onions and 1/2 tsp salt. Cook for 5 minutes, stirring occasionally, until the onions soften and start to turn glossy.

Reduce heat to medium-low and continue cooking for 25–30 minutes, stirring every few minutes, until deeply golden and caramelized. If the pan starts to look dry or the onions threaten to stick, add 1–2 tbsp water and scrape up the browned bits.

Stir in 2 tsp balsamic vinegar and 1/4 tsp black pepper. Cook for 1 minute to reduce, then remove from heat.

Step 4: Toast the walnuts and slice the pears

If your walnuts aren’t toasted yet, toast them in a dry skillet over medium heat for 4–6 minutes, shaking and stirring often, until fragrant. Cool slightly, then roughly chop.

Slice the pears to about 1/8-inch (3 mm) thick. For neat layering, try to keep slices consistent. (No need to peel unless the skin is thick or you prefer a softer texture.)

Step 5: Whisk the custard

In a medium bowl, whisk together 2 eggs, 3/4 cup (180 ml) half-and-half, 1 tsp Dijon, 1/4 tsp black pepper, and 1 tsp honey (if using). Taste and add up to 1/8 tsp salt only if needed (blue cheese varies a lot in saltiness).

Step 6: Assemble the pie in layers

Spread the caramelized onions evenly over the bottom of the par-baked crust.

Arrange the pear slices in slightly overlapping layers on top (circles or loose “shingles” both work). Sprinkle over the thyme, then scatter the toasted walnuts and crumbled blue cheese evenly.

Slowly pour the custard over the filling. Pause once or twice so the custard can settle into the layers. (If your pie plate is very full, you may not need every last drop.)

Step 7: Bake until golden, melty, and set

Bake at 375°F (190°C) for 35–40 minutes, until the center is set (it should jiggle slightly but not look wet) and the crust is deeply golden.

If the crust edges brown too quickly, loosely cover the rim with foil for the last 10–15 minutes.

Step 8: Cool briefly, then slice and serve

Cool the pie for 10 minutes before slicing. This short rest helps the custard firm up so slices hold their shape.

Serve warm or at room temperature. If you’d like, finish with a pinch of fresh thyme leaves and a few extra walnut pieces right before serving.

Pro Tips

• Choose firm pears: Bosc and Anjou keep their shape better than very ripe Bartlett pears.
• Go low and slow on onions: True caramelization takes time. Medium-low heat gives you sweetness without burning.
• Par-baking matters: This pie has juicy fruit and custard; par-baking helps keep the bottom crust crisp rather than soggy.
• Blue cheese control: For a milder pie, use 3 oz (85 g) blue cheese; for bolder tang, use the full 4 oz (113 g).
• Neater slices: Let the pie cool 20 minutes if you want very clean wedges for a party.

Variations

• Make it a tart: Use a 9-inch (23 cm) tart pan with removable bottom. The bake time is the same; start checking at 33 minutes.
• Swap the cheese: Replace blue cheese with 4 oz (113 g) goat cheese for a creamier, less pungent version.
• Add a leafy layer: Wilt 2 packed cups (60 g) baby spinach in the onion pan, squeeze dry, and layer it under the pears.

Storage & Make-Ahead

Cool completely, then cover and refrigerate for up to 4 days. Reheat slices on a sheet pan at 350°F (175°C) for 10–12 minutes (this helps re-crisp the crust). You can caramelize the onions up to 3 days ahead and store them refrigerated; assemble and bake the pie the day you plan to serve. The fully baked pie also tastes great at room temperature, making it a strong option for entertaining.

Nutrition (per serving)

Approximate, based on 8 slices: 420 calories, 26 g fat, 36 g carbohydrates, 12 g protein, 3 g fiber, 520 mg sodium.