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instant pot green bean casserole

Instant Pot Green Bean Casserole

  • Author: Joanie Simon
  • Total Time: 27 mins
  • Yield: 8 - 10 servings 1x


A recipe for Instant Pot Green Bean Casserole that’s made in one pot and come together in under 30 minutes, made with fresh green beans.


  • 2 Tbs butter
  • 1 yellow onion, minced
  • 4 oz baby bella mushrooms, chopped
  • 1/2 tsp dried thyme (1 tsp fresh)
  • 1/2 tsp salt
  • 1 cup chicken or vegetable stock
  • 32 oz fresh green beans, trimmed
  • 1 Tbs corn starch
  • 3/4 cup sour cream
  • 1/4 tsp garlic salt
  • Dash nutmeg
  • 1 tsp Worcestershire
  • 1/4 tsp pepper
  • 4 oz diced low-moisture mozzarella
  • 4 oz french fried onions – divided


  1. Put the Instant Pot on ‘saute’ mode and add in the butter and the onion and stir to cook the onions until fragrant.
  2. Stir in the mushrooms, thyme and salt and keep stirring until the mushrooms soften slightly.
  3. Add the stock and fresh green beans to the pot and stir to combine.
  4. Place the lid on the Instant Pot and set to manual for 1 minute, ensuring the top is sealed.
  5. While that cooks, combine the sour cream, salt, nutmeg, Worcestershire, and pepper in a small bowl and set aside.
  6. Once the timer goes off, quick release the pressure.
  7. Once the pressure is completely released, sprinkle 1 Tbs corn starch over all of the mixture and stir so that it dissolves.
  8. Next, add the mozzarella, the sour cream mixture and 2 oz of the fried onions to the pot and stir to combine. The cheese will start to melt and get stringy.
  9. Transfer the combined mixture to a 2 quart serving casserole dish and top with remaining French fried onions.
  10. Serve and enjoy!
  • Prep Time: 12 mins
  • Cook Time: 15 mins
  • Category: Side
  • Cuisine: American