What Does Baking Soda Do In Cookies? (2024)

And how is it different from baking powder?

Published on January 24, 2023

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What Does Baking Soda Do In Cookies? (2)

Even the most amateur bakers know one thing to be true: Baking is a science. Leaving out even one ingredient (or using the right ingredients in the wrong amounts) can result in a decidedly un-delicious disaster.

But how, you ask, can baking soda be so important when it looks so unassuming? Here's what you need to know about the tiny-but-mighty leavening agent — and what the heck it's doing in your cookie recipe:

Baking Soda vs. Baking Powder

Baking soda and baking powder are both leavening agents, or ingredients that make baked goods rise. They look almost identical and they have similar purposes, but they are not the same thing and they can't always be used interchangeably.

When baking soda, also called sodium bicarbonate, is combined with an acid (like buttermilk or lemon juice) and a liquid, it produces the carbon dioxide that helps the dough or batter rise.

Baking powder, meanwhile, already contains the sodium bicarbonate and acid it needs to become activated—all it needs is a liquid to produce carbon dioxide. Most recipes that call for baking powder are referring to the double-acting varieties, which react twice in the baking process: Once when it's combined with liquid, and again when the product is heated.

What Does Baking Soda Do In Cookies?

So, if baking soda and baking powder both create carbon dioxide, are they really that different? Yes and no. Baking soda is used in recipes that include one or more acids. When the recipe doesn't include an acid, baking powder is used. A recipe that calls for both ingredients probably contains an acid, but not enough to completely leaven the batter or dough.

Baking soda also serves another important purpose when it comes to cookies: It encourages spreading by raising the mixture's pH, which slows protein coagulation. This gives the dough more time to set before the eggs set, which results in a more evenly baked cookie.

Baking Soda Substitute

Don't try to substitute baking soda in cookie recipes that are quite acidic (like snickerdoodles or lemon crinkles). Substitution works better when you're dealing with something sugar-based and dense (like peanut butter or chocolate chip).

You technically can use baking powder as a baking soda alternative, but you'll need to consider a few factors first:

  • Baking soda is generally about three times stronger than baking powder, so adjust your recipe accordingly.
  • Baking soda and baking powder can produce cookies with different textures. Baking soda is typically used for chewy cookies, while baking powder is generally used for light and airy cookies.
  • Since baking powder is comprised of a number of ingredients (baking soda, cream of tartar, cornstarch, etc.), using it instead of pure baking soda will affect the taste of your cookies.

You can also try potassium bicarbonate, a dietary supplement that is often recommended as a baking soda alternative for people with high sodium levels, as a substitute. If you're not watching your sodium intake, you'll probably want to add a pinch of salt to get the closest flavor match.

Learn more: What's a Good Baking Soda Substitute?

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What Does Baking Soda Do In Cookies? (2024)

FAQs

What Does Baking Soda Do In Cookies? ›

Baking soda and baking powder are common baking ingredients. They are both leavening agents, meaning they help baked goods to rise.

What happens if you don't put enough baking soda in cookies? ›

You technically can leave out baking soda in certain recipes (like chocolate chip cookies or pancakes) in a pinch, but you need to understand that your finished product will not be as light and fluffy as the recipe intended. Unless you have no other option, you really should use a leavening substitute.

What happens if baking soda is more in cookies? ›

One -too much soda makes cookies puff quickly then immediately deflate into cow pie looking cookies. They spread out thinly. Too much makes them taste terrible, like metal and leaves a weird semi sour taste in the mouth. This also happens if too much baking powder or other leavening is used, flat and bitter.

What role does baking soda play in a baked item? ›

Baking soda and baking powder are both leaveners made from a chemical called sodium bicarbonate. When sodium bicarbonate is combined with an acid, it produces a gas (carbon dioxide, C02, the same gas we exhale when we're breathing) that lifts cakes, cookies or other baked goodies while they're in the oven.

What activates baking soda in cookies? ›

Baking soda is activated when it is mixed with an acid. So in baking, we activate baking soda by pairing it with an acidic ingredient (such as lemon juice, buttermilk, or yogurt) in our recipes. Note that heat can also activate baking soda.

How does baking soda react? ›

When baking soda is mixed with an acid and a liquid, it will create bubbles of carbon dioxide gas that give it a fluffy texture. That being said, baking soda can react without acid if it is warmed above 122°F or subject to long-term heat and humidity.

Does baking soda make cookies rise or flatten? ›

When baking soda, also called sodium bicarbonate, is combined with an acid (like buttermilk or lemon juice) and a liquid, it produces the carbon dioxide that helps the dough or batter rise.

How much baking soda should I put in cookies? ›

Good rule of thumb: I usually use around 1/4 teaspoon of baking soda per 1 cup of flour in a recipe. Baking soda CAN leaven a baked good when exposed to heat. However, unless it is neutralized with an acid, your finished baked good will likely have a metallic aftertaste—like I mention above.

What is a good substitute for baking soda? ›

There are several pantry-friendly ingredients that you can use as baking soda substitutes, including egg whites, self-rising flour and even club soda. Or, you can use baking powder - and even a couple of extremely scientific sounding items that perhaps you just happen to have lying around - baker's ammonia anyone?

Can too much baking soda make cookies bitter? ›

One of the most common misfortunes among bakers is that they are using too much baking soda or baking powder. Know that too much baking soda or baking powder in cakes will not just lead to a metallic and bitter taste, but it can also make a big mess in the oven as it will rise beyond expectations.

What does egg do in cookies? ›

Egg whites entrap more air while contributing more water, encouraging steam and gluten formation: perfect conditions for lean cookies that are thick and puffy. Cakey. Yolks cut the water and throw in fat, hindering both gluten development and aeration, producing cookies that are dense, tender, and rich.

What does baking soda do to gray hair? ›

Gray hair can be affected detrimentally when baking soda is added to it, as the natural oils will become stripped and cause breakage of dry hair due to excessive dryness and brittleness.

What happens if you use baking soda instead of baking powder in cookies? ›

That is why you will notice that recipes usually call for a small amount of baking soda, typically ¼ teaspoon per 1 cup of flour. Do not make the mistake of trying to substitute equal parts baking soda for baking powder in recipes. Your baked goods will have no leavening, be quite flat, and have an altered taste.

What makes cookies airy? ›

Baking soda

When added to dough, baking soda releases a carbon dioxide gas which helps leaven the dough, creating a soft, fluffy cookie.

What happens if I put baking soda in my cookies instead of baking powder? ›

However, if you're in a pinch, the substitution is one teaspoon baking soda equals three teaspoons baking powder. Baking soda is also much stronger than baking powder and, by trying to provide enough leavening, you may wind up with an unpleasant metallic, salty taste in the final baked product.

Does baking soda make cookies fluffier? ›

Baking soda

When added to dough, baking soda releases a carbon dioxide gas which helps leaven the dough, creating a soft, fluffy cookie.

Can baking soda replace baking powder in cookies? ›

Baking powder is made of baking soda plus cream of tartar and cornstarch. Baking powder can be substituted for baking soda by tripling the amount of baking powder. Baking soda can be substituted for baking powder by dividing the amount of baking powder needed by 4 and adding twice that amount of cream of tartar.

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