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Caramelized Onion & Mushroom Pot Pie

Caramelized Onion & Mushroom Pot Pie


  • Author: Lina
  • Total Time: 1 hour 20 minutes
  • Yield: 6 servings 1x
  • Diet: Vegetarian, optionally Vegan, Gluten Free (with substitutions)

Description

Caramelized Onion & Mushroom Pot Pie is a rich, savory, and comforting vegetarian dish featuring sweet caramelized onions and earthy mushrooms enveloped in a flaky, golden pie crust. Perfect for cozy dinners and special occasions, this make-ahead pot pie delivers warm, indulgent flavors while being customizable to suit various dietary preferences including vegan and gluten-free options.


Ingredients

Scale

Caramelized Onions

  • 2 large onions, thinly sliced
  • 2 tbsp butter or oil

Vegetable Filling

  • 3 cups assorted mushrooms (cremini, button, shiitake), diced
  • 2 garlic cloves, minced
  • 1 shallot, diced
  • 1 tbsp fresh thyme leaves
  • 2 tbsp chopped fresh parsley

Sauce

  • 3 tbsp butter
  • 3 tbsp all-purpose flour (or gluten-free flour for GF version)
  • 2 cups vegetable broth
  • 1/2 cup heavy cream or plant-based cream alternative
  • Salt and black pepper, to taste

Pie Crust

  • 1 double crust pie dough (buttery or plant-based for vegan; gluten-free crust as needed)

Instructions

  1. Caramelize the Onions: Slowly cook thinly sliced onions in butter or oil over low heat for 25-30 minutes until they turn sweet and golden, creating the essential flavor base.
  2. Sauté Mushrooms and Aromatics: Add diced mushrooms, garlic, and shallots to the pan with caramelized onions. Cook until mushrooms release moisture and brown for maximum flavor.
  3. Make the Roux and Sauce: Push vegetables aside, melt butter in the pan, and whisk in flour to form a roux. Gradually add vegetable broth and cream, stirring constantly until sauce thickens and coats the filling beautifully.
  4. Assemble the Pie: Transfer the filling into a pie dish lined with one layer of pie crust. Cover with the second crust, seal edges, and make decorative slits on top to vent steam.
  5. Bake Until Golden: Preheat oven to 375°F (190°C). Bake the pot pie for 30-40 minutes until crust is golden and flaky and the filling bubbles through vents.

Notes

  • Take your time caramelizing onions to develop natural sweetness without burning.
  • Use a mix of mushrooms for added texture and flavor depth.
  • Don’t overfill the pie to ensure even baking and avoid overflow.
  • Keep pie dough chilled before baking to maintain flakiness.
  • Let the pie rest 10-15 minutes after baking so the filling sets properly.
  • Fresh mushrooms are preferred, but if using frozen, thaw and drain well.
  • The recipe can be made vegan by using plant-based butter and cream.
  • The pie can be made gluten-free by substituting the crust and ensuring gluten-free ingredients.
  • Leftovers store refrigerated up to 3 days; unbaked pie can be frozen for up to one month.
  • Prep Time: 40 minutes
  • Cook Time: 40 minutes
  • Category: Main Course
  • Method: Baking
  • Cuisine: American / Comfort Food

Nutrition

  • Serving Size: 1 slice (1/6 of pie)
  • Calories: 350
  • Sugar: 6g
  • Sodium: 350mg
  • Fat: 20g
  • Saturated Fat: 10g
  • Unsaturated Fat: 7g
  • Trans Fat: 0g
  • Carbohydrates: 30g
  • Fiber: 4g
  • Protein: 6g
  • Cholesterol: 40mg

Keywords: pot pie, caramelized onion, mushroom, vegetarian, comfort food, plant-based, vegan option, gluten-free option, cozy meal