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Instant Pot French Onion Soup

This instant pot french onion soup features perfectly caramelized onions in a rich, dark broth topped with a toasted baguette and hot and bubbly Gruyere cheese.
Course Soup
Cuisine American
Keyword Instant Pot French Onion Soup
Prep Time 10 minutes
Cook Time 1 hour 5 minutes
Total Time 1 hour 15 minutes
Servings 6 servings
Calories 369 kcal
Author Stephanie

Ingredients

  • 6 Tablespoons butter
  • 4 large yellow onions finely sliced
  • 2 large sweet onions finely sliced
  • 2 sprigs fresh thyme
  • 2 Bay leaves
  • ¾ cup dry white wine I used Chardonnay
  • 4 cups beef broth
  • 1.5 cups chicken broth
  • 3 Tablespoons olive oil
  • 1 loaf French Bread
  • 6 slices Gruyere cheese*
US Customary - Metric

Instructions

  1. Press the sauté button on your instant pot. Wait until "hot" is displayed, then add the butter. (Waiting until it's hot prevents smoking.)
  2. Once melted, add the onions, thyme, and bay leaves. Use a large silicone spatula and stir occasionally, allowing the butter to coat the onions. Do this for about 5 minutes, the onions will start to soften and release liquid.
  3. Add three Tablespoons of water to the instant pot, cover, and hit the “pressure cook” button. Set the timer for 20 minutes. Hit the quick release valve to release the pressure.
  4. Remove the lid and press the sauté button again. Let it cook for 5 more minutes to release some of the liquid, then add the wine and let it simmer for an additional 20 minutes to let the wine cook out and allow the onions to fully caramelize.
  5. Remove the bay leaves and the thyme stems.

  6. Pour in the beef and chicken broth. Let it simmer for another 10 minutes while you prepare the baguettes. 

Preparing the baguettes:

  1. Thickly slice the French bread diagonally, in roughly the size as the serving bowls you’ll be using. Brush each side with olive oil and sprinkle lightly with salt. Place in a single layer on a baking sheet and bake at 350 degrees for about 5 minutes, until the top begins to turn brown and the bread is nice and firm. Watch them carefully to ensure they don’t burn.

Serving the soup:

  1. Set the oven temp to a broil.
  2. Fill oven-safe bowls with the soup and top each with a baguette and a thick slice of gruyere cheese. Place the bowls on a baking sheet and broil them in the oven for 3-5 minutes, until the top is a golden-brown and bubbly. Carefully remove, top with additional fresh thyme, and serve.
  3. If you don’t have oven-safe bowls, you can melt the cheese on the baguettes in the oven and then place the cheesy bread on top of the filled-soup bowls.

Recipe Notes

*Other cheese options include Comte or Emmental (Swiss)

High quality beef and chicken broth make a huge difference in the flavor of this soup!

Note: The baguettes can be made up to 3 days ahead of time and can be stored in an airtight container once they’ve completely cooled.

Nutrition Facts
Instant Pot French Onion Soup
Amount Per Serving
Calories 369 Calories from Fat 234
% Daily Value*
Total Fat 26g 40%
Saturated Fat 12g 60%
Cholesterol 55mg 18%
Sodium 1001mg 42%
Potassium 415mg 12%
Total Carbohydrates 17g 6%
Dietary Fiber 2g 8%
Sugars 9g
Protein 12g 24%
Vitamin A 11.8%
Vitamin C 19.3%
Calcium 34.3%
Iron 6.5%
* Percent Daily Values are based on a 2000 calorie diet.