Instant Pot Spaghetti Alfredo is an easy, one-pot recipe that combines the tastiness of spaghetti with the richness of Alfredo sauce.

A plate of spaghetti alfredo with two pieces of garlic bread on it.

Instant Pot Spaghetti Alfredo combines the flavors of two classic pasta dishes – spaghetti and fettucine Alfredo – in one tasty dish.

This simple version is made entirely in the Instant Pot and takes minimal prep. Most of the time is hands-off, and since it’s made in one pot, the cleanup is easy.

The Alfredo mellows the acidity of the sauce, which makes for rich and creamy spaghetti that is so good!

How to make Instant Pot spaghetti with Alfredo sauce

Here you’ll find step-by-step photos showing how to make this recipe. The full recipe is given below.

Step 1: Press sauté.

A meat masher in browned Italian sausage.

Step 2: When hot, add Italian sausage, and cook, stirring occasionally, until browned. Drain grease from Italian sausage and return to the inner pot.

Sauteed onion and browned Italian sausage in an Instant Pot.

Step 3: Add the onion, and cook, stirring regularly, until softened, about 2-3 minutes.

Step 4: Stir in the garlic and cook, stirring regularly, for 30 seconds.

Step 5: Pour in the wine and scrape up any browned bits. Press cancel.

Spaghetti sauce, spaghetti noodles, and water in an Instant Pot.

Step 6: Add the spaghetti sauce, noodles, and water.

Step 7: Close and lock the lid. Turn the pressure release valve to sealing. Press manual high pressure and adjust the cooking time to 5 minutes.

Step 8: When cooking time finishes, let the pressure release for 5 minutes.

Step 9: After 5 minutes, carefully turn the pressure release valve to venting to quickly release the remaining pressure. Unlock and remove the lid.

Cooked spaghetti in an Instant Pot.

Step 10: Give the spaghetti a good stir. If the noodles aren’t as soft as you would like, cover and let the spaghetti sit for a few minutes.

Cooked spaghetti alfredo topped with grated Parmesan.

Step 11: Stir in the Alfredo sauce until combined.

Step 12: Serve topped with grated Parmesan cheese.

A fork holding a twirl of spaghetti Alfredo.

Serving suggestions

I like to serve the spaghetti with garlic bread and a green salad. The garlic bread is great for sopping up any extra sauce, and the green salad helps to cut the richness of the pasta.

A plate of Instant Pot spaghetti alfredo topped with grated parmesan and parsley.

Storage

Store any leftover spaghetti in an airtight container in the refrigerator. It will keep for up to 4 days when properly stored in the fridge.

More Instant Pot pasta recipes!

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A plate of spaghetti alfredo with two pieces of garlic bread on it.
5 from 1 vote

Instant Pot Spaghetti Alfredo

Servings: 10 servings
Prep Time: 10 minutes
Cook Time: 18 minutes
Pressure Release: 5 minutes
Total Time: 43 minutes
Instant Pot Spaghetti Alfredo is an easy, one-pot dinner recipe. This simple spaghetti has the added richness and creaminess of Alfredo sauce for even more flavor.

Ingredients

  • 1 pound ground Italian sausage
  • 1 cup diced white or yellow onion
  • 5 cloves garlic minced
  • ¼ cup red wine
  • 25 ounce jar spaghetti sauce
  • 16 ounces dry spaghetti noodles broken in half
  • 4 cups water
  • 15 ounce jar Alfredo sauce.
  • Grated Parmesan cheese

Instructions
 

  • Press sauté
  • When hot, add Italian sausage, and cook, stirring occasionally, until browned.
  • Drain grease from Italian sausage and return to the inner pot.
  • Add the onion, and cook, stirring regularly, until softened, about 2-3 minutes.
  • Stir in the garlic and cook, stirring regularly, for 30 seconds.
  • Pour in the wine and scrape up any browned bits.
  • Press cancel.
  • Add the spaghetti sauce, noodles, and water.
  • Close and lock the lid.
  • Turn the pressure release valve to sealing.
  • Press manual high pressure and adjust the cooking time to 5 minutes.
  • When cooking time finishes, let the pressure release for 5 minutes.
  • After 5 minutes, carefully turn the pressure release valve to venting to quickly release the remaining pressure.
  • Unlock and remove the lid.
  • Give the spaghetti a good stir. If the noodles aren’t as soft as you would like, cover and let the spaghetti sit for a few minutes.
  • Stir in the Alfredo sauce until combined.
  • Serve topped with grated Parmesan cheese.

Notes

  • Italian sausage: Hot or mild ground Italian sausage will work.
  • Red wine: You can substitute beef broth if you prefer. If you use beef broth, I recommend using reduced-sodium broth.
  • Spaghetti sauce: The spaghetti sauce adds a lot of the flavor, so choose a sauce that you like. 
  • Alfredo sauce: I recommend choosing an Alfredo sauce that you like. 
  • Nutrition values are estimates. 

Nutrition

Serving: 1serving | Calories: 433kcal | Carbohydrates: 41g | Protein: 15g | Fat: 22g | Saturated Fat: 9g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 8g | Cholesterol: 62mg | Sodium: 962mg | Potassium: 463mg | Fiber: 3g | Sugar: 5g | Vitamin A: 307IU | Vitamin C: 8mg | Calcium: 37mg | Iron: 2mg

Disclaimer: Nutritional values were calculated using a third-party tool and are provided as an estimation only.

Course: Main Course
Cuisine: American, Italian
Keyword: spaghetti alfredo

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A plate of spaghetti alfredo with two pieces of garlic bread on it.

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