Home Foods How To Thicken Alfredo Sauce – 5 Easy Ways

How To Thicken Alfredo Sauce – 5 Easy Ways

by Gina Elizabeth
How to fix salty alfredo sauce

Did your alfredo sauce turn out thin? You’re not alone.

Here are 5 easy ways to thicken alfredo sauce.

#UltimateAlfredo

#UltimateAlfredoSauce

5 Ways to Thicken Alfredo Sauce

Sooo easy!

1. How To Thicken Alfredo Sauce With Reduction

Strain your alfredo sauce through a sieve then pour it back in the pot. Simmer with the lid off, for about 5-10 minutes. Stir frequently to avoid scorching your sauce. This will thicken alfredo sauce without adding extra ingredients. Note that the flavor of your sauce may be more concentrated using this method.

Keep your alfredo sauce uncovered as it cools to allow the steam to vent. Alfredo sauce will thicken further as it cools.

A simple straining and reduction will do the trick but can take longer than other methods. If you’re in a pinch use corn starch or flour to thicken your alfredo sauce (see #3 & #4 below).

[READ: How To Cook A Turkey For The First Time]

What is reduction?

Reduction is simmering or boiling a liquid (without a lid) such as a sauce, stock, soup, stew, juice, wine, vinegar until the desired concentration or thickness is reached by evaporation.

Tip: Stir frequently to avoid scorching your sauce. Or don’t. Some people scorch the bottom to add flavor — this is known as a fond in French culinary terms.

2. How To Thicken Alfredo Sauce With Flour

In a separate bowl, mix 1 tbsp of flour with 1 tbsp of water until smooth. Uncover the alfredo sauce and gradually add the slurry while stirring. Simmer over a low heat for about 10 minutes or until the alfredo sauce thickens.

Flour is commonly used for thickening, but you can also use potato starch, arrowroot flour.

  1. In a separate bowl, use one tablespoon of flour for every cup of liquid you want to thicken.
  2. Whisk in equal parts cold water. For every tablespoon of starch you added, add one tablespoon of cold water to the starch. Whisk until there are no lumps.
  3. Gradually pour the starch slurry slowly into your Alfredo sauce, whisking constantly.
  4. Simmer until you get the desired thickness.
  5. Add seasoning if needed.

Or make a roux

What is a roux?

A roux (pronounced “roo”) is also French and describes a paste created with equal parts flour and fat (melted butter, oil, or lard).

When using a flour slurry you have to simmer your alfredo sauce for a while to cook out that raw flour taste. Using a roux speeds things up.

Here’s how to make a roux:

  1. Melt 1 tablespoon of unsalted butter in a skillet.
  2. Add 1 tablespoon of flour. Stir while cooking until fully incorporated and the roux is cooked.
  3. Stir the cooled roux into your sauce. Bring to a simmer (uncovered) and cook for at least 10 minutes.
  4. Adjust seasonings as needed.

Tip: You can also make a roux using corn starch

3. How To Thicken Alfredo Sauce With Corn Starch

Mix 1 tablespoon of corn starch and 1 tablespoon of water. Add the mixture to the alfredo sauce and combine thoroughly. Bring it up to a boil and let it cook for 10 more minutes. Do not add dry cornstarch directly to your alfredo sauce as this will cause clumping.

More Corn Starch Thickeners

You can also substitute corn flour, cornmeal, polenta, or masa harina for corn starch. Note that corn thickening ingredients may dilute the sauce’s flavor if you add too much.

Tip: Do not use coarse-grind cornmeal, it won’t dissolve properly in the sauce.

4. How To Thicken Alfredo Sauce With Potato Starch

In case you were wondering — yes, you can make a potato starch roux. Potatoes taste really good, and a potato roux is delicious!

This is a quick-fix thickening method, so the potato flake proportions are more to taste than an exact measurement.

Here’s how:

  1. Melt 1 tablespoon of unsalted butter in a skillet.
  2. Add 1 tablespoon of potato starch. Stir while cooking until fully incorporated and the roux is cooked.
  3. Stir the cooled roux into your alfredo sauce. Bring to a simmer (uncovered) and cook for about 5 minutes or until the sauce is thickened.
  4. Adjust seasonings as needed.

Or add a tablespoon of instant potato flakes to hot alfredo sauce. Stir thoroughly. Let cook for a minute. The potatoes will absorb some of the liquid and thicken it. Potato flakes change the flavor slightly.

You get similar results with a rice flour roux. 

5. How To Thicken Alfredo Sauce With Egg Yolks

Be sure to follow the below instructions to properly thicken your alfredo sauce with tempered eggs:

  1. Beat an egg yolk in a bowl. Slowly ladle in small portions of your warm Alfredo sauce, as you whisk the egg.
  2. Add small amounts of alfredo sauce liquid until you have a full cup. Once you’ve added enough liquid, continue whisking.
  3. Whisk the egg mixture back into your sauce. Bring the sauce to a boil and simmer until it has thickened.

Be careful with this one so you don’t end up with scrambled eggs in your sauce!

Couldn’t be easier.

Did you know?

Modern fettuccine Alfredo was invented by Alfredo di Lelio in Rome. According to family accounts, in 1892 Alfredo di Lelio began to work in a restaurant that was located in piazza Rosa and run by his mother Angelina. – Wikipedia

Alfredo Sauce Thickening FAQs

Can I thicken alfredo sauce with heavy cream?

Add heavy cream for a little extra thickness.

  1. Whisk in a little heavy cream into the sauce in a saucepan over medium-heat and bring to a simmer.
  2. Stir until mixed well with the Alfredo sauce and until the desired consistency is reached.

It can take a lot of cream though to thicken a large quantity of sauce so not always a great option.

You can also substitute cream cheese and whisk into the Alfredo Sauce into a pot over heat until the cheese is smooth.

How do you thicken alfredo sauce with cheese?

Parmesan Cheese

  1. Gradually add some freshly grated Parmesan or white cheddar cheese into your Alfredo sauce over heat.
  2. Stir to incorporate, giving it time to thicken. Add more Parmesan cheese as needed until the desired consistency is reached.

Shredded Mozzarella Cheese 

  1. Gradually add shredded mozzarella cheese into Alfredo sauce, over low heat, until the cheese is smooth.
  2. Stir to incorporate, giving it time to thicken. Add more cheese as needed until the desired consistency is reached.

Cream Cheese

  1. Using the weight of your liquids as a base, add between 0.1 and one percent xanthan gum depending on the desired consistency.
  2. Vigorously whisk or blend xanthan gum into your Alfredo sauce.
  1. Cube softened cream cheese and whisk into the Alfredo Sauce into a pot over heat until the cheese is smooth.
  2. Gradually add cream cheese to your sauce.
  3. Stir to incorporate, giving it time to thicken. Add more cream cheese as needed until the desired consistency is reached.

Can I thicken alfredo sauce with vegetables?

Yes, you can purée some vegetables and add them to the sauce. Puréed cooked (such as steamed) cauliflower works great! As long as you don’t mind the taste of vegetables in your sauce.

Share This Article

If you found this post on how to thicken alfredo sauce helpful, please share it!

:: saves for later ::

Related Posts