Cornstarch

What Is Cornstarch?

Cornstarch is a fine, white, odorless powder obtained by processing the pure starch portion of the corn kernel, stripped of protein and fiber. Unlike corn flour, it is protein-free and fiber-free; it is made up of almost entirely carbohydrate.

When heated with water it gels, forming a thick consistency, so in the kitchen it is used primarily as a binder and thickener.

Nutritional Value of Cornstarch

100 g of cornstarch provides approximately 381 kcal of energy, and almost all of it (91.3 g) is carbohydrate; protein and fat ratios are negligible. Cornstarch is naturally gluten-free.

What Are the Benefits of Cornstarch?

Cornstarch is not a nutrient-rich product; its main function is to give consistency. Its gluten-free nature offers a safe alternative to wheat flour in sauces and desserts for those on a gluten-free diet.

This information is general; cornstarch is a food and is not a substitute for medical treatment. Since it contains a high ratio of pure carbohydrate, portion control is beneficial.

How Is Cornstarch Selected?

When buying starch, attention should be paid to the package not having absorbed moisture and being free of clumps and free-flowing.

• The color should be smooth white; yellowing or an off smell indicates spoilage.
• A "gluten-free" label provides extra assurance for celiac patients.
• The packaging should be undamaged and airtight.

How Is Cornstarch Stored?

Cornstarch can keep its freshness for up to 1–2 years in a cool, dry, closed container; it is recommended to store it in a tightly sealed jar to prevent it from absorbing moisture.

Using Cornstarch in the Kitchen

Cornstarch is used to thicken soups, sauces, stews, and desserts (milk pudding, custard). Since it can clump when added directly to a hot liquid, it is recommended to first mix it with a small amount of cold water and then add it to the mixture.

How Is Consistency Achieved with Starch?

One tbsp of starch is mixed with two-three tbsp of cold water until smooth, then slowly added to the boiling soup or sauce and boiled while stirring for 1–2 minutes; this process prevents clumping and gives the desired consistency.

Which Recipes Use Cornstarch?

Cornstarch is used to give consistency to milk pudding, custard, cherry sauce, chicken stock soup, and many Far Eastern sauces; it is also added in some cookie recipes together with flour to lighten the texture.

Frequently Asked Questions

Are cornstarch and corn flour the same thing?

No; corn flour is obtained by grinding the whole kernel and contains protein/fiber, while cornstarch is produced only from the starch portion and is almost pure carbohydrate.

Does cornstarch contain gluten?

No, cornstarch is naturally gluten-free; however, due to the possibility of cross-contamination in processing facilities, celiac patients are advised to prefer certified products.

Can flour be used instead of starch?

Flour can also be used to give consistency, but starch gives twice as strong a thickening effect and leaves the result clearer; generally twice the amount of flour is used compared to the starch amount stated in the recipe.

Why does starch clump?

When added directly to a hot liquid, starch granules quickly gel on the outside and seal in the inside, forming a clump; this is why it needs to be mixed with cold water first and then added to the hot mixture.

Why is cornstarch added to desserts?

In desserts like milk pudding and custard, starch thickens the mixture to give a smooth, spoon-cuttable consistency; it is a more stable and less risky thickener than egg.