What Does Baking Soda Do In Cookies? (2024)

And how is it different from baking powder?

By

Corey Williams

What Does Baking Soda Do In Cookies? (1)

Corey Williams is a food writer for MyRecipes and Allrecipes. She has a decade of journalism experience.

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 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.

What happens if you don't put 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.

What is the difference between baking soda and baking powder in cookies? ›

When to use which one. Baking soda is used in recipes that also include an acidic ingredient, such as cream of tartar, buttermilk, or citrus juice. Conversely, baking powder is typically used when the recipe doesn't feature an acidic ingredient, as the powder already includes the acid needed to produce carbon dioxide.

Does baking soda make cookies rise or flatten? ›

They rise.

The baking soda then reacts to the acidic components present in brown sugar, creating gases that cause the cookie to rise.

Why does baking soda make cookies thinner? ›

too much egg relative to other ingredients can lead to a cakey cookie and cause the edges to spread out more. too much baking soda raises the pH of the dough and this can disrupt the gluten network, leading to thinner cookies with less structure.

What is the secret to chewy cookies? ›

Cornstarch helps product soft and thick cookies. Using more brown sugar than white sugar results in a moister, softer cookie. An extra egg yolk increases chewiness. Rolling the cookie dough balls to be tall and lumpy instead of wide and smooth gives the cookies a bakery-style textured thickness.

Does baking soda make cookies soft or hard? ›

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.

What if you put too much baking soda in cookies? ›

Using too much baking soda or baking powder can really mess up a recipe, causing it to rise uncontrollably and taste terrible.

What can I use instead of baking soda in cookies? ›

If you don't have baking soda on hand, you can use triple the amount of baking powder instead. Alternative substitutions include potassium bicarbonate, baker's ammonia, or self-rising powder. Baking soda is a staple ingredient found in the cupboards of both seasoned and amateur bakers.

What makes cookies fluffy and not flat? ›

Flour adds fluff and texture to the cookies. Adding too little flour can cause cookies to be flat, greasy, and crispy. Most recipes assume you'll use all-purpose, but if you want a lighter, crumblier cookie texture, choose one with a lower protein content such as cake-and-pastry flour.

What does egg do in cookies? ›

Egg yolks also help to keep all of the ingredients together, so, with cookies, they're needed to achieve the right consistency of the dough. And egg whites can help get the cookies to a fluffy end result. Using whole eggs will result in a cookie that has a cake-like texture with a rich flavor.

How much baking soda to use for 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 causes flat cookies when baking? ›

OVEN IS TOO HOT

If your cookies consistently come out flat, you may have selected the wrong baking temperature. If you bake cookies using too much heat, the fats in the dough begin to melt before the other ingredients can cook together and form your cookie's rise.

Can I use both baking soda and baking powder in cookies? ›

As you can see above, sometimes we want the best of both worlds! Some recipes call for both baking soda and baking powder in order to have the highest effect of acid-neutralizing and leavening powers.

What does cornstarch do to cookies? ›

“The result is added tenderness with more structure.” You don't need much of the ingredient to notice significant changes in your favorite recipe. Add a teaspoon or two to your dry ingredient mix and it will drastically change the texture. It's also fun to experiment until you get the exact finish you desire.

Can I leave baking soda out of a cookie recipe? ›

For baked goods that don't require too much leavening, such as cookies or pancakes, it's actually OK to leave out the baking soda completely — they just won't be as light and fluffy. If you do go this route when making pancakes, Gan recommends pouring less batter into the pan to cover the same surface area.

What can replace baking soda in cookies? ›

If you don't have baking soda on hand, you can use triple the amount of baking powder instead. Alternative substitutions include potassium bicarbonate, baker's ammonia, or self-rising powder. Baking soda is a staple ingredient found in the cupboards of both seasoned and amateur bakers.

What happens if I forgot baking soda? ›

Leaving baking soda out of the cake prevents it from rising, but you can use baking powder as a substitute. Baking soda is a salt that makes food light and fluffy. If you don't have this ingredient at hand, use a baking soda substitute. Without it, your cake won't rise and can turn out flat.

What happens if I leave baking powder out of a recipe? ›

Simply, without these leaveners, many cookies would fall flat and cake layers would be dense and stodgy. But baking powder and soda are not interchangeable, and if you're out of one, the other won't act as a direct substitute (though it can be part of the solution—more on that below).

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