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A black bowl with spiral pasta, peas, and tuna on a linen napkin.
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5 from 16 votes

Instant Pot Tuna Casserole

Instant Pot Tuna Noodle Casserole is a remake of a retro casserole without any processed ingredients for a tasty pantry staple dinner. A quick, affordable, tasty dinner.
Course Main Course
Cuisine American
Keyword instant pot tuna casserole, quick tuna pasta dinner, tuna casserole
Prep Time 10 minutes
Cook Time 12 minutes
Servings 6 servings
Calories 479kcal
Author Eileen Kelly



  • Turn your Instant Pot to Saute. Add 1 Tablespoon of the olive oil or butter.
  • Add in the onion and celery to the hot oil. Saute until the onion is translucent, about 3 minutes.
  • Stir in the garlic and continue to cook another minute to release the flavor of the garlic.
  • Remove the vegetables to a small plate, set aside. Shut off the Instant Pot. (The pot will still be hot)
  • Pour the remaining 2 Tablespoons of olive oil into the vessel of the Instant Pot. Stir in the all-purpose flour and whisk to form a brown roux.
  • Whisk in the coconut milk into the roux. Be sure to stir up any brown bits from the bottom of the pot.
  • Mix in the chicken stock, dill, salt, and pepper.
  • Add back in the sauteed veggies. Then, layer in the pasta, tuna, and cheese. (Do not mix) See Note 6.
  • Place the lid on the Instant Pot and set to manual pressure, high for 5 minutes. The noodles will be soft. If you prefer harder noodles, set time to 3 minutes.
  • Once cook time is complete, do a quick release.
  • Stir in the peas and let sit for 2 minutes.
  • Taste, if needed adjust seasoning. Serve and enjoy.


Note 1: Dairy-Free, use olive oil. Divided and used as 1 Tablespoon for sauteing the vegetables. 2 Tablespoons to make the roux.
Note 2: Regular milk can be used.
Note 3: Always taste before serving and if needed, adjust any seasoning. 
Note 4: We prefer solid white albacore tuna, chunky white can be used. Also, try not to use tuna packed in oil. The extra oil can make the sauce greasy. 
Note 5:  Cashew cheese can be used for dairy-free
Note 6: To ensure the ingredients cook correctly and prevent a burn message, do not mix ingredients. 
Any nutritional data I provide is an approximation and actual dietary information can vary based on ingredients and proportion sizes.


Serving: 1serving | Calories: 479kcal | Carbohydrates: 71g | Protein: 22g | Fat: 11g | Saturated Fat: 3g | Cholesterol: 14mg | Sodium: 473mg | Potassium: 435mg | Fiber: 5g | Sugar: 7g | Vitamin A: 274IU | Vitamin C: 12mg | Calcium: 97mg | Iron: 2mg