Can Baking Powder Replace Cornstarch? The Surprising Truth Revealed

The short answer is no; baking powder cannot replace cornstarch because it lacks the thickening properties necessary for creating smooth, thick textures.

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Can baking powder replace cornstarch? If you’ve ever found yourself in the middle of a recipe only to realize you’re out of cornstarch, you might wonder if baking powder can come to the rescue. The short answer is no; baking powder cannot replace cornstarch because it lacks the thickening properties necessary for creating smooth, thick textures.

But don’t worry—understanding why these two ingredients serve different purposes can help you make better choices in the kitchen. In this article, we’ll explore the unique roles of cornstarch and baking powder, uncover suitable substitutes for cornstarch, and clear up common misconceptions about these pantry staples. Whether you’re dealing with a recipe gone awry or just curious about ingredient functions, we’ve got you covered. Keep reading to discover expert tips and practical advice that will make your cooking and baking more successful.

Key Facts:

  1. Cornstarch is a thickening agent, while baking powder is a leavening agent.
  2. Baking powder contains baking soda, cream of tartar, and sometimes cornstarch.
  3. Cornstarch thickens by absorbing liquid and swelling when heated.
  4. Baking powder produces carbon dioxide gas bubbles to make baked goods rise.
  5. Suitable substitutes for cornstarch include arrowroot powder, all-purpose flour, and potato starch.

Understanding Common Kitchen Ingredients

Can Baking Powder Replace Cornstarch
Can Baking Powder Replace Cornstarch

When it comes to cooking and baking, having a solid grasp of your ingredients is crucial. Cornstarch and baking powder are two common staples found in many kitchens, but they serve vastly different purposes. Let’s dive into the world of these powdery white substances and uncover their unique properties.

What is Cornstarch?

Cornstarch is a fine, powdery substance that plays a crucial role in many recipes. But what exactly is it, and why is it so important in cooking and baking?

Definition and Origin

Cornstarch, as the name suggests, is derived from corn. It’s made by grinding the endosperm of corn kernels into a fine, white powder. This process removes all the other parts of the kernel, leaving behind a pure starch that’s incredibly versatile in the kitchen.

Thickening Properties of Cornstarch

The magic of cornstarch lies in its thickening properties. When mixed with liquid and heated, cornstarch undergoes a process called gelatinization. The starch granules absorb the liquid and swell, creating a thick, glossy texture. This is why cornstarch is often used to thicken sauces, gravies, and pie fillings.

Key Takeaway: Cornstarch is a powerful thickening agent that works by absorbing liquid and swelling when heated, creating a smooth, thick consistency in your dishes.

Common Uses in Cooking and Baking

Cornstarch is a kitchen superhero with many uses. In savory dishes, it’s often used to thicken sauces and gravies. In baking, it can be added to cake flour to create a finer, more delicate crumb. It’s also a key ingredient in many puddings and custards, providing that silky smooth texture we all love.

Cornstarch in Gluten-Free Cooking

For those following a gluten-free diet, cornstarch is a godsend. It’s naturally gluten-free, making it an excellent thickener for those who need to avoid wheat-based products. It’s often used in gluten-free baking to improve the texture of baked goods, mimicking some of the properties that gluten provides in traditional recipes.

What is Baking Powder?

Now that we’ve covered cornstarch, let’s turn our attention to baking powder. This ingredient is a staple in many baked goods, but its role is quite different from that of cornstarch.

Definition and Components

Baking powder is a leavening agent, which means it helps baked goods rise. It’s actually a mixture of ingredients, typically including baking soda (sodium bicarbonate), cream of tartar (a dry acid), and sometimes cornstarch (used as a filler to absorb moisture).

How Baking Powder Works

The magic of baking powder happens when it comes into contact with liquid and heat. The baking soda and acid in the mixture react, producing carbon dioxide gas. This gas forms bubbles in your batter or dough, causing it to rise and create a light, fluffy texture in your baked goods.

Tip: To test if your baking powder is still active, mix a teaspoon with hot water. If it fizzes vigorously, it’s still good to use!

Uses in Baking

Baking powder is a key ingredient in many baked goods, including cakes, muffins, biscuits, and pancakes. It provides the lift that makes these treats light and airy. Without baking powder, many of our favorite baked goods would be flat and dense.

Types of Baking Powder

There are two main types of baking powder: single-acting and double-acting. Single-acting baking powder reacts when it comes into contact with liquid. Double-acting baking powder, which is more common, reacts twice: once when it comes into contact with liquid, and again when exposed to heat.

Differences Between Cornstarch and Baking Powder

Now that we’ve explored cornstarch and baking powder individually, let’s compare them side by side to understand why they can’t be used interchangeably.

Chemical Properties and Reactions

Cornstarch and baking powder have fundamentally different chemical properties. Cornstarch is a pure starch that reacts with liquid and heat to thicken mixtures. Baking powder, on the other hand, is a mixture of ingredients that react to produce gas, causing baked goods to rise.

Functionality: Thickening vs. Leavening

The primary function of cornstarch is to thicken, while baking powder’s main job is to leaven. Cornstarch absorbs liquid and swells, creating a thick, smooth texture. Baking powder produces gas bubbles, which create lift and lightness in baked goods.

Taste and Texture Implications

Using cornstarch results in a neutral taste and a smooth, thick texture. Baking powder, however, can impart a slightly tangy taste due to its acidic component. It also creates a light, airy texture in baked goods.

Cooking and Baking Outcomes

If you were to use baking powder instead of cornstarch to thicken a sauce, you’d end up with a bubbly, possibly bitter-tasting mess instead of a smooth, thickened sauce. Conversely, using cornstarch instead of baking powder in a cake would result in a dense, flat cake rather than a light, fluffy one.

Key Takeaway: Cornstarch and baking powder serve entirely different purposes in cooking and baking. They are not interchangeable due to their distinct chemical properties and functions.

Practical Implications of Substituting Baking Powder for Cornstarch

Now that we understand the fundamental differences between cornstarch and baking powder, let’s explore what would happen if you tried to use baking powder as a substitute for cornstarch.

Why Baking Powder Cannot Replace Cornstarch

Baking powder simply lacks the thickening properties that make cornstarch so useful in cooking. When you add baking powder to a liquid, it will create bubbles and possibly some foam, but it won’t thicken the mixture. This is because baking powder doesn’t contain the starch molecules necessary for thickening.

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Situations to Avoid Using Baking Powder as a Substitute

You should never use baking powder as a substitute for cornstarch in recipes that require thickening. This includes:

  1. Sauces and gravies
  2. Pie fillings
  3. Puddings and custards
  4. Stir-fry dishes

Using baking powder in these situations would not only fail to thicken your dish but could also negatively impact the taste and texture.

Real-World Examples of Substitution Failures

Imagine you’re making a luscious cherry pie filling. You reach for the cornstarch, only to find you’re out. In desperation, you decide to use baking powder instead. The result? A bubbly, foamy mess that refuses to set and tastes oddly tangy. Your perfect pie is now a disaster.

Or consider a savory scenario: you’re whipping up a creamy mushroom sauce for your steak. You substitute baking powder for cornstarch. Instead of a silky-smooth sauce, you end up with a thin, fizzy liquid that’s more reminiscent of a science experiment gone wrong than a decadent steak topping.

Tip: Always keep a variety of thickeners on hand, such as cornstarch, arrowroot powder, and all-purpose flour. This way, you’ll never be caught short when a recipe calls for thickening.

Suitable Substitutes for Cornstarch

While baking powder isn’t a suitable substitute for cornstarch, there are several other ingredients that can step in when you’re in a pinch. Let’s explore some of the best alternatives.

Arrowroot Powder

Arrowroot powder is one of the closest substitutes for cornstarch. It’s a starch extracted from the roots of the arrowroot plant, and it behaves very similarly to cornstarch in recipes.

Properties and Uses

Arrowroot powder is flavorless, making it ideal for use in delicate dishes where you don’t want to alter the taste. It creates a clear, shiny gel when mixed with water, which is perfect for glossy sauces and fruit pie fillings.

How to Substitute

You can substitute arrowroot powder for cornstarch in a 1:1 ratio. However, keep in mind that arrowroot doesn’t hold up well to prolonged cooking or high temperatures, so add it at the end of cooking for best results.

All-Purpose Flour

All-purpose flour is a pantry staple that can be used as a cornstarch substitute in a pinch.

Properties and Uses

Flour is less potent than cornstarch, so you’ll need to use more to achieve the same thickening effect. It also needs to be cooked longer to remove the raw flour taste.

How to Substitute

Use 2 tablespoons of all-purpose flour for every 1 tablespoon of cornstarch called for in your recipe. Be sure to cook the mixture for a few minutes to get rid of the floury taste.

Other Starches

There are several other starches that can be used as cornstarch substitutes:

Potato Starch

Potato starch is a fine, white powder that’s a great 1:1 substitute for cornstarch. It’s particularly good for thickening at high temperatures.

Tapioca Starch

Tapioca starch, derived from cassava root, can be used as a cornstarch substitute in a 2:1 ratio (2 tablespoons tapioca starch for every 1 tablespoon cornstarch).

Rice Flour

Rice flour, especially glutinous rice flour, can be used as a thickener. Use 2 tablespoons of rice flour for every 1 tablespoon of cornstarch.

Key Takeaway: While baking powder can’t replace cornstarch, there are many other ingredients that can. Arrowroot powder, all-purpose flour, and other starches like potato starch and tapioca starch are all effective substitutes.

Common Misconceptions

In the world of cooking and baking, there are many myths and misconceptions. Let’s clear up some common misunderstandings about cornstarch and baking powder.

Misunderstanding Cornstarch and Baking Powder Interchangeability

One of the most prevalent misconceptions is that cornstarch and baking powder can be used interchangeably. As we’ve discussed, these two ingredients serve entirely different purposes. Cornstarch is a thickener, while baking powder is a leavener. Using one in place of the other will lead to disappointing results.

Myths about Baking Powder as a Thickener

Some people believe that because baking powder contains cornstarch, it can be used as a thickener. While it’s true that some baking powders contain cornstarch as an anti-caking agent, the amount is too small to provide any significant thickening power.

Correcting Common Mistakes in Recipes

It’s not uncommon to see recipes that confuse cornstarch and baking powder. If you come across a recipe that calls for baking powder to thicken a sauce or cornstarch to make a cake rise, it’s likely there’s a mistake in the recipe. Always use your best judgment and don’t be afraid to question unusual ingredient uses.

Tip: If you’re unsure about an ingredient in a recipe, do a quick online search or consult a reliable cookbook. Understanding the purpose of each ingredient can help you spot potential errors and improve your cooking skills.


In our culinary journey exploring the question “Can baking powder replace cornstarch?”, we’ve uncovered some crucial insights. We’ve learned that while both cornstarch and baking powder are common kitchen ingredients, they serve vastly different purposes and cannot be used interchangeably.

Cornstarch is a powerful thickening agent, perfect for creating smooth, glossy sauces and fillings. On the other hand, baking powder is a leavening agent, crucial for making our favorite baked goods rise and achieve that perfect fluffy texture.

The next time you find yourself out of cornstarch, remember that baking powder isn’t the solution. Instead, reach for alternatives like arrowroot powder, all-purpose flour, or other starches. These substitutes will help you achieve the desired thickening effect without compromising your dish.

Understanding the unique properties and functions of different ingredients is key to becoming a more confident and successful cook. So, keep experimenting, keep learning, and most importantly, keep enjoying the wonderful world of cooking and baking!

FAQs About Can Baking Powder Replace Cornstarch?

Q: Can arrowroot powder replace cornstarch?
A: Yes, arrowroot powder can replace cornstarch in a 1:1 ratio. It’s an excellent substitute that creates a clear, shiny gel when mixed with water, making it ideal for glossy sauces and fruit pie fillings.

Q: What is the function of cornstarch in recipes?
A: Cornstarch functions as a thickening agent in recipes. When mixed with liquid and heated, it absorbs the liquid and swells, creating a thick, smooth texture in sauces, gravies, pie fillings, and other dishes.

Q: Is baking powder the same as baking soda?
A: No, baking powder and baking soda are not the same. Baking powder is a mixture of baking soda, cream of tartar, and sometimes cornstarch. Baking soda is pure sodium bicarbonate. They have different chemical properties and are used differently in recipes.

Q: How to make a cornstarch slurry?
A: To make a cornstarch slurry, mix equal parts cornstarch and cold water in a small bowl until smooth. For example, combine 1 tablespoon cornstarch with 1 tablespoon cold water. Whisk until no lumps remain, then slowly add to your hot liquid while stirring constantly.

Q: What are the best substitutes for cornstarch?
A: The best substitutes for cornstarch include arrowroot powder, all-purpose flour, potato starch, tapioca starch, and rice flour. Arrowroot powder is the closest substitute, working well in a 1:1 ratio. All-purpose flour can be used in a 2:1 ratio (2 tablespoons flour for 1 tablespoon cornstarch).


Can baking powder replace cornstarch? The answer is a resounding no. Throughout this exploration, we’ve uncovered the fundamental differences between these two pantry staples. Cornstarch is a powerful thickening agent, crucial for creating smooth, glossy textures in sauces, gravies, and pie fillings. Baking powder, on the other hand, is a leavening agent that produces carbon dioxide gas to help baked goods rise.

We’ve debunked the myth of their interchangeability and provided practical alternatives for when you’re out of cornstarch. From arrowroot powder to all-purpose flour, there are several suitable substitutes that can save your recipe in a pinch.

As you continue your culinary adventures, remember that understanding the unique properties of your ingredients is key to successful cooking and baking.

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Richard Charpentier is the CEO of Baking Innovation, a leading provider of baking solutions. He has over 20 years of experience in the baking industry and has been a driving force behind the company's success.