How Much Cornstarch Do I Need to Thicken Soup and Gravy?

Cornstarch can be used in the same way flour can be to thicken a sauce, but in smaller amounts:

For a medium-thick sauce, use a cornstarch slurry of one tablespoon cornstarch and one tablespoon cold water per cup of sauce.

Cornstarch and water should be fully blended before being added to the sauce.

Stir the mixture constantly over a medium flame until it gets thick and starts to bubble.

The cornstarch needs two more minutes of cooking time.

What are some other alternatives to cornstarch?


This powder is derived from the rhizomes of tubers belonging to the Marantaceae family. If you can’t have gluten but still want thick gravy, this is a terrific natural alternative. Mix 2–3 tablespoons of arrowroot powder with the same amount of water to make a slurry, the same way you would with cornstarch or flour to thicken gravy. Using a whisk or a wooden spoon, stir in 1 cup of hot liquid until dissolved and the gravy thickens.


The cassava plant is the source of tapioca. To make the gravy thicker, whisk in 1 1/2 teaspoons of tapioca starch into the boiling liquid. Keep whisking until all of the tapioca starch is mixed in and the gravy has reached the right thickness.

Potato Starch

Make a slurry of 1 tablespoon of starch and 2 tablespoons of water for this gluten-free gravy thickening. Whisk or stir the flour into the one cup of boiling liquid, and keep doing this often until the gravy is the right thickness.

Vegetable Puree

Who would have guessed? Use anything you have in your vegetable crisper with this ingenious method of thickening gravy. You may add roasted root vegetables like potatoes, parsnips, beets, or carrots to your gravy by first roasting them and then pureeing them in a blender. (But keep in mind that different vegetables have different flavors, so adding one to your stock base will change its flavor.)

How beneficial is corn starch to your health?

Cornstarch is low in protein, fiber, and essential vitamins and minerals, but it is heavy in calories and carbohydrates.

The following nutrients can be found in 128 grams (1 cup) of cornstarch:

488 calories

0.5 g of Protein 

117 grams of carbohydrates

1 g of fiber

Potentially harmful to heart health

During the process of making refined carbohydrates, like cornstarch, many of their good qualities have been taken away.

Frequent use of refined carbs like cornstarch has been linked to bad effects on the health of the heart.

One study found that eating a lot of processed meals and other foods with a high glycemic index was associated with an increased risk of developing cardiovascular disease, obesity, and hypertension.

Is a possible contributor to elevated blood sugar.

Cornstarch is high on the glycemic index (a measure of how much a certain item raises or lowers blood sugar) because it contains so many simple sugars.

It also doesn’t have enough fiber, which is an important vitamin that keeps sugar from getting into the body quickly. 

Because of this rapid digestion, cornstarch may cause dangerously high blood sugar levels.

Deficient in necessary nutrition

When it comes to nutrition, cornstarch doesn’t offer much beyond calories and carbs.

The typical serving size for most individuals is only one to two tablespoons, which is eight to sixteen grams. Even though a lot of it does have small amounts of micronutrients like copper and selenium, this is the case.

If you want to make sure you’re getting all the nutrients you need, you should eat cornstarch as part of a well-rounded diet that also includes a wide range of other nutrient-rich foods.

If you want to make sure you’re getting all the nutrients you need, you should eat cornstarch as part of a well-rounded diet that also includes a wide range of other nutrient-rich foods.

What can you do if you put too much cornstarch in a recipe?

Reduce the thickness of the liquid and cornstarch mixture using water. Adding water to the cornstarch and sauce mixture may be necessary if you find it to be too thick. Put in another quarter cup of water to begin. Put some in a taste test, and then decide if more water is needed.

Adding water may necessitate further heating and stirring after the liquid has been cooled.

What are some dos and don’ts when using cornstarch?


When thickening a dish with corn starch, it is best to first create a slurry.

Simply put, slurry is a powdered substance combined with a small amount of liquid. Since corn starch is a powder, it will clump if you add boiling liquid to it without first warming it. If you want to avoid clumping when adding it to a boiling meal, mix it with a little amount of cold water first. Instead of water, a simple syrup could be preferable when creating a slurry for certain sweets.

When making a slurry, it’s best to shake it rather than mix it.

When you combine corn starch slurry with cold water, the mixture will still form lumps. You can remove the lumps from the mixture by whisking or forking it, but an easier method is to throw the mixture in a jar and shake it. After a quick shake, your slurry will be completely smooth and lump-free.

You should incorporate corn starch into your frying batters and breadings.

One of the best things about corn starch that is often overlooked is its ability to spread heat evenly. Corn starch can be used instead of flour or mixed with flour to make sure that food doesn’t burn and browns evenly. For instance, fried chicken is much less prone to developing black spots.


Corn starch should not be used to thicken very acidic liquids.

This will cause the liquid to become lumpy.

When it comes to thickening sauces, corn starch is not your best bet when there are a lot of acidic ingredients present, such as lemon juice. You’re taking a chance, but if the acid content is quite low, it could work. If it doesn’t work, the sauce may end up tasting chalky and being virtually as watery as before adding the corn starch. Some people may find it unpleasant because of the corn starch.

Corn starch should not be over-stirred.

Cornstarch won’t thicken your meal, no matter how much you add, if you mix it too much before it thickens. Water is absorbed and held in place by the granules of corn starch. Corn starch loses its thickening capacity if the links that capture the water are broken from too much agitation. Once a corn starch-based sauce starts to thicken, you should stir it very gently to prevent it from breaking.

Once a corn starch-based sauce starts to thicken, you should stir it very gently to prevent it from breaking.

How do I know when my cornstarch is cooked?

Cornstarch won’t thicken until it reaches 95 °C (203 °F) in the oven. As soon as that happens, the sauce typically begins to thicken rapidly and become more see-through. Constant whisking is frequently to blame when thickened cornstarch loses its consistency again. After a thickening network has formed, further movement will disrupt the setting procedure. When the network of starch that sets and holds the liquid breaks down, the sauce becomes thinner. The sauce becomes more watery as the released liquid evaporates.

How do you make gravy?

Gravy, at its most fundamental, is just a pan sauce that calls for liquid and a thickener. Flour, fat, and stock are the traditional ingredients in turkey gravy. With just those, plus some salt and pepper, you can make some delicious turkey gravy. By combining flour and fat to create a roux, the stock can be made thick enough to coat a spoon. But gravies usually need a lot more flour than is used in a standard roux to get the right thickness. (The standard recipe for gravy calls for 3 tablespoons of flour, 2 tablespoons of fat, and 1 cup of boiling stock.) Cornstarch can be used in place of flour, and other liquids like stock can be substituted for

How can I thicken gravy in a healthy way?

Pureed Vegetables

You may replace refined starches like flour and cornstarch with healthier options like carrots and cauliflower, according to For use as a thickener, the veggies are boiled until soft, at which point they are pureed to create a paste. As carrots have a sweet flavor on their own, you may not need to add any additional sugar to your sauce.

Whole-wheat Flour

Baked products and breads typically call for all-purpose flour, which is typically made of refined, white flour. Sauces, gravies, stews, and soups can all benefit from a thickening paste made with this ingredient and either water or melted butter. White flour is often used as a thickening agent, but even a tiny amount can have a significant impact on your daily carbohydrate intake. says that if you want to avoid digestive problems, you should cook with whole-wheat flour instead of refined flour. There will be less sugar and more fiber in your sauce if you use whole-wheat flour.


Barley and other whole grains are great sources of protein and other important nutrients. As the Cleveland Clinic points out, it’s also low in carbs and contains fiber. Barley flour can be used in sauces instead of flour or cornstarch to get the right consistency. Barley can also be boiled and pureed to form a smooth paste that can be used as a thickener in a low-carb sauce.


Flaxseed is another option for thickening a sauce without increasing the carbohydrate content. Because of its high levels of fiber, iron, and omega-3 fatty acids, this superfood comes highly recommended by the Cleveland Clinic. If you have a coffee grinder, you may use it to finely grind flaxseeds, which can then be used in place of flour in a variety of recipes.

Oat Flour

Oats are an excellent source of magnesium and zinc. This grain has a high amount of soluble fiber and is also a source of complex carbohydrates. Gluten-free baked items can be made with raw oats by grinding them into flour. Low-carbohydrate sauces can be thickened with oat flour.

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