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Jump to RecipeThis skinny Instant Pot fettuccine Alfredo is creamy, cheesy and comforting, but much lighter than the classic restaurant version. The fettuccine cooks right in garlicky broth under pressure, soaking up flavor as it goes, then it is finished with a light Alfredo sauce made from milk, cornstarch, Parmesan and herbs. You get silky, clingy noodles and rich flavor without heavy cream or a stick of butter.
Everything happens in one pot, so there is no separate pot of pasta water to drain and very little cleanup. It is ready in about 20 minutes from start to finish. Add grilled chicken, shrimp or steamed broccoli to make it a complete meal. If you love creamy pasta, you might also like my chicken Alfredo bake or Cajun shrimp Alfredo pasta.
Why You Will Love This Skinny Alfredo
- Lighter but still creamy. Milk and Parmesan replace most of the heavy cream and butter.
- One pot. The pasta and sauce cook together in the Instant Pot.
- Fast. Only 3 minutes of pressure cooking.
- Flavorful noodles. Cooking the pasta in broth seasons it from the inside out.
- Kid friendly. Mild, cheesy and easy to love.
Ingredients You Will Need for Skinny Instant Pot Fettuccine Alfredo
You need just a handful of simple ingredients. Exact amounts are in the recipe card below.
- Fettuccine: 8 ounces, broken in half so it fits flat in the pot.
- Olive oil and garlic: a quick sauté builds the flavor base.
- Low sodium chicken or vegetable broth: cooks the pasta and becomes part of the sauce.
- Skim or 1 percent milk: the light, creamy base of the Alfredo sauce.
- Cornstarch: thickens the milk into a silky sauce without butter and flour.
- Freshly grated Parmesan cheese: the heart of Alfredo. Grate it yourself for the smoothest sauce.
- Onion powder, dried basil and dried parsley: add savory depth and a little herbiness.
- Salt and pepper: to taste.
How to Make Skinny Instant Pot Fettuccine Alfredo
1. Sauté the garlic
Set your Instant Pot to Sauté and add the olive oil. When it is hot, add the minced garlic and cook for just 10 to 20 seconds until fragrant. Turn off the Sauté function right away so the garlic does not burn.
2. Add the pasta and broth
Break the fettuccine in half and scatter it in the pot in a crisscross pattern so the noodles do not clump together. Pour in the broth and press the pasta down gently with a spoon so it is completely submerged. Submerged pasta cooks evenly and does not stick.
3. Pressure cook
Secure the lid and set the valve to Sealing. Cook on High Pressure for 3 minutes. When the time is up, let the pressure release naturally for 6 minutes, then carefully turn the valve to Venting to release the rest of the steam. Open the lid and stir well with tongs to separate any noodles that stuck together.
4. Make the light Alfredo sauce
In a small bowl, whisk the milk and cornstarch together until smooth. Pour it into the pot along with the Parmesan, onion powder, dried basil, dried parsley, salt and pepper. Freshly grated cheese from a box grater melts much more smoothly than pre shredded cheese.
5. Thicken and rest
Turn the Instant Pot back to Sauté and stir constantly for 2 to 3 minutes, until the sauce thickens and coats the noodles. Turn off the heat and let the pasta sit for a few minutes. The sauce continues to thicken as it rests. Serve topped with extra Parmesan and fresh parsley.
Tips for the Best Instant Pot Alfredo
- Break the noodles. Whole fettuccine will not fit flat and may cook unevenly.
- Crisscross the pasta. Layering it in different directions prevents clumping.
- Keep it submerged. Any dry pasta above the broth will stay hard.
- Do not skip the natural release. It finishes cooking the pasta gently and reduces foaming.
- Grate your own Parmesan. Pre shredded cheese has anti caking agents that can make the sauce grainy.
How This Alfredo Stays Light
Traditional fettuccine Alfredo is made with butter, heavy cream and plenty of cheese, which is delicious but very rich. This skinny version keeps the Parmesan, the star of the dish, and swaps the cream for milk thickened with cornstarch. Cornstarch creates a silky texture without the need for a butter and flour roux. Cooking the pasta in broth also adds flavor, so you do not miss the extra fat.
The starch released by the pasta during pressure cooking helps thicken the sauce even more. The result is a creamy, satisfying bowl of pasta with a fraction of the calories and saturated fat of the restaurant version.
What If I Do Not Have an Instant Pot?
You can make this on the stovetop in a large, deep skillet or Dutch oven. Sauté the garlic in the oil, add the broth and bring it to a boil. Add the broken fettuccine and simmer, stirring often, for about 10 to 12 minutes, until the pasta is al dente and most of the broth is absorbed. Add a splash more broth if it gets too dry. Stir in the milk and cornstarch mixture, the Parmesan and seasonings, and simmer for 2 to 3 minutes until creamy.
Easy Variations
- Chicken Alfredo: stir in sliced grilled chicken or shredded rotisserie chicken.
- Shrimp Alfredo: sauté shrimp separately and add them at the end.
- Broccoli Alfredo: add broccoli florets on top of the pasta before pressure cooking.
- Extra creamy: use 2 percent or whole milk, or stir in 2 tablespoons of cream cheese.
- Garlic lovers: add 2 extra cloves of garlic and a pinch of garlic powder.
- Spinach and mushroom: stir in baby spinach and sautéed mushrooms after cooking.
Why Cook Pasta in the Instant Pot?
Cooking pasta under pressure is one of the most useful Instant Pot tricks. Instead of boiling a big pot of water and draining it, the noodles cook in just enough liquid to be absorbed. That means every bit of flavor from the broth and garlic ends up in the pasta rather than going down the drain. The starch that the pasta releases stays in the pot too, which naturally thickens the sauce and helps it cling to each strand. It is also hands off.
Once the lid is locked, you do not need to stir, watch for boil overs or time the noodles. A general rule for Instant Pot pasta is to take the package cooking time, cut it in half and subtract one to two minutes. For most fettuccine, that works out to about 3 to 4 minutes at high pressure, followed by a short natural release.
A Lighter Alfredo You Can Feel Good About
A restaurant serving of fettuccine Alfredo can easily top 1,000 calories, much of it from butter and heavy cream. This version comes in at about 345 calories per serving, with 18 grams of protein from the Parmesan and milk.
It still tastes rich and cheesy, which makes it a great option when you are craving comfort food but want something that will not weigh you down. To boost the nutrition even more, stir in a couple of handfuls of spinach or steamed broccoli, and pair it with a big salad.
What to Serve With Fettuccine Alfredo
A crisp green salad with a lemony vinaigrette is the perfect contrast to creamy pasta. Roasted broccoli, green beans or asparagus add color and nutrition, and warm garlic bread is always welcome. For protein, serve it with grilled chicken, garlic butter chicken bites or pan seared shrimp.
Storage and Reheating
- Refrigerator: store leftovers in glass meal prep containers for up to 3 days.
- Reheating: the sauce thickens in the fridge. Reheat gently in a pan over low heat with a splash of milk or broth, stirring until creamy, or microwave with a little milk.
- Freezing: not recommended, since milk based sauces can separate after freezing.
Common Mistakes to Avoid
- Burning the garlic. It only needs a few seconds before you turn off the Sauté function.
- Adding the cheese too early. Cheese can scorch under pressure. Add it after cooking.
- Using a quick release right away. It can cause starchy liquid to spray from the valve.
- Serving immediately without resting. A few minutes of rest lets the sauce thicken properly.
Frequently Asked Questions
Can I use whole fettuccine noodles?
Breaking them in half helps them fit flat and cook evenly, but you can use whole noodles in an 8 quart Instant Pot.
Can I double this recipe?
Yes, in a 6 quart or larger Instant Pot. Keep the cooking time the same and make sure the pasta is submerged.
Why did I get a burn notice?
This can happen if pasta sticks to the bottom or there is not enough liquid. Stir after sautéing the garlic and make sure all the broth is added.
Can I use gluten free pasta?
Yes, but gluten free pasta cooks faster. Reduce the pressure time to 2 minutes and check the package.
What milk works best?
Skim or 1 percent keeps it light. Two percent or whole milk makes a richer sauce.
How many calories are in this skinny Alfredo?
About 345 calories per serving, far less than a typical restaurant portion.
Final Thoughts
Skinny Instant Pot fettuccine Alfredo gives you all the comfort of a creamy pasta dinner with less fuss and fewer calories. The pasta cooks in flavorful broth, the light Parmesan sauce comes together in minutes, and there is only one pot to wash. Keep this recipe in your back pocket for busy nights when you want something cozy on the table fast.
Nutrition Per Serving
| Nutrient | Amount |
|---|---|
| Calories | 345 kcal |
| Protein | 18 g |
| Carbohydrates | 48 g |
| Fat | 9 g |
| Saturated Fat | 4 g |
| Fiber | 2 g |
| Sugar | 5 g |
| Sodium | 690 mg |
Nutrition values are estimates calculated from standard ingredient data and will vary with the brands and exact amounts you use.
Skinny Instant Pot Fettuccine Alfredo
Ingredients
Method
- Set the Instant Pot to Sauté, heat the oil and cook the garlic 10 to 20 seconds. Turn off Sauté.
- Add the fettuccine in a crisscross pattern and pour in the broth, pressing the pasta under the liquid.
- Seal and cook on High Pressure for 3 minutes. Natural release 6 minutes, then quick release. Stir to separate the noodles.
- Whisk the milk and cornstarch and add to the pot with the Parmesan, onion powder, basil, parsley, salt and pepper.
- Turn on Sauté and stir 2 to 3 minutes until thickened. Rest a few minutes and serve with extra Parmesan.
