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French Onion Tart - The Old Vintage Way

Course Main Course
Cuisine French
Keyword caramelized onion tart recipe, classic french onion recipe, classic french onion tart, classic french recipe, fall appetizer, fall cooking, fall recipes, french fall recipe, french onion tart, french tart, onion recipe, sunday dinner recipes
Prep Time: 10 minutes
Cook Time: 45 minutes
Total Time: 55 minutes
Servings: 6 people
Calories 569 kcal


  • 1 pie crust 1 pie crust
  • 2 pounds sweet onions 2 pounds of sweet onions - peeled and finely sliced
  • 2 tablespoons olive oil 2 tablespoons olive oil
  • 2 cups heavy cream 2 cups heavy cream
  • 4 eggs 4 eggs
  • 2 tablespoons flour 2 tablespoons flour
  • 1 cup Emmenthal cheese 1 cup Emmenthal cheese, grated (optional)
  • salt and pepper salt and pepper
  • Nutmeg Nutmeg


  1. Preheat the oven to 400F.

  2. Spread a thin layer of butter on a 10-inch diameter pie pan. Roll out the pie crust over it and press the bottom border to fit the pie crust.

  3. Peel the onions and slice them thin by hand or with the help of a mandoline.

  4. In a wide bottom pan, add two tablespoons of olive oil over medium-high heat. Add the onion slices and cook at medium heat for about 20 minutes, stirring once in a while. You want the onions to become translucent but not brown. Lower the heat if that happens.

  5. Add the two tablespoons of flour over the onions, mix well, and continue cooking for about 2 more minutes. It will look and feel thicker consistency.

  6. Add the heavy cream to the onion mixture. Mix well and cook at low heat for another 2 minutes.

  7. In a bowl, whisk your eggs with salt, pepper, and nutmeg. Add the egg mixture to the onion mixture. Mix well until the eggs and onion mixture is well incorporated.

  8. Drop the onion mixture into the pie crust. Smooth the top. Add the grated cheese over it, an optional step.

  9. Place the pie dish over a cookie sheet. Place in the hot oven and bake for 20 minutes. Serve hot.

Nutrition Facts
French Onion Tart - The Old Vintage Way
Amount Per Serving
Calories 569 Calories from Fat 414
% Daily Value*
Fat 46g71%
Saturated Fat 24g150%
Polyunsaturated Fat 3g
Monounsaturated Fat 15g
Cholesterol 106mg35%
Sodium 183mg8%
Potassium 298mg9%
Carbohydrates 30g10%
Fiber 2g8%
Sugar 10g11%
Protein 10g20%
Vitamin A 1317IU26%
Vitamin C 8mg10%
Calcium 249mg25%
Iron 1mg6%
* Percent Daily Values are based on a 2000 calorie diet.