Ever found an old box of baking soda in your pantry and wondered if it’s still good to use?

While baking soda doesn’t spoil like perishable foods, it can lose its effectiveness over time.

In this post, I’ll explain how to tell if your Baking Soda Has Gone Bad and share tips on how to keep it fresh for all your baking and cleaning needs.

baking soda and a spoon on a chopping board.

What Is Baking Soda?

Baking soda, also known as sodium bicarbonate or bicarbonate of soda is used in baking and cooking to help leaven baked goods, give them a fluffy texture, and make them rise.

How Long Does Baking Soda Last?

The shelf life of baking soda depends upon how it is stored. If you keep your baking soda in a sealed container in a cool, dry place, its shelf life could be very long sometimes.

However, most manufacturers recommend replacing an open box after three months due to the potential of clumping or absorbing moisture or odours from other items in the refrigerator or pantry if kept in an unsealed bag or box.

Can Baking Soda Expire?

It certainly does however an unopened box of old baking soda may still work okay in your baking recipes or baking project.

Baking soda is a chemical leavening agent made of sodium bicarbonate, an alkaline salt. It is a white, odourless powder available in granular and powdered forms. Fresh baking soda has a shelf life of 18 months.

After this time, baking soda will lose its potency and cease to be an effective leavening agent. Therefore, it is important to check the expiration date of any baking soda before use. 

baking soda in a bowl.

How to Tell if Baking Soda Has Gone Bad?

Check the Expiration Date.

The first thing you should do when checking to see if your baking soda is still good is to check the expiration date on the package.

Baking soda typically has a shelf life of 2-3 years, so if your baking soda is expired, it’s best to throw it out and get a new one.

Look for Clumps.

Another way to tell if your baking soda has gone bad is to look for clumps. If your baking soda has clumped together, it’s no longer effective, and you should toss it out.

Smell the Baking Soda.

Another way to tell if your baking soda has gone bad is to smell it. Baking soda should have a neutral smell, so it’s probably time to get a new one if it smells off.

Test the Baking Soda With This Simple Trick

Finally, you can test the baking soda to see if it’s still good. Baking soda reacts with acidic ingredients such as lemon juice or vinegar. Add one teaspoon of baking soda to a spoonful of lemon juice or another acidic ingredient. If the baking soda creates a chemical reaction or bubbling action then it’s safe to say it’s still good to use.

Baking soda on yellow background.
Baking soda on yellow background.

How to Store Baking Soda?

Baking soda is a staple ingredient in many households, and while it has an indefinite shelf life, it may lose its effectiveness over time. To ensure your baking soda stays fresh for as long as possible, it’s essential to store it properly.

The best way to store baking soda is in an airtight container, like a mason jar or plastic food storage container. This will keep moisture out and prevent the powder from absorbing unwanted flavours or odours. Keep your baking soda dry!

You should also ensure that the lid is tightly shut after each use. If you don’t have a sealed container, keep baking soda in its original box or package and seal it with tape to minimize exposure to outside elements.

Additionally, it’s best to store baking soda away from strong-smelling ingredients like onions and garlic that could cause it to absorb unwanted aromas.

Uses for Expired Baking Soda

Baking soda is a useful cleaning agent. If you have expired baking soda then don’t throw it in the bin, use the old baking soda to get rid of fridge smells, eliminate odours, clean bathroom surfaces and freshen your laundry. You can still use baking soda for cleaning when it has passed its best-by-date.

Are Baking Soda and Baking Powder the Same Thing?

Baking soda and baking powder are not the same things. Baking soda is a single-acting leavening agent, unlike baking powder which is a double-acting leavening agent.

This means that baking soda begins to work as soon as it comes into contact with moisture and acid (like vinegar or buttermilk) while baking powder only starts working after it’s been heated.

So, when using baking soda in a recipe, you should mix it with acid before adding other ingredients. Another difference between baking soda and baking powder is that baking soda has a slightly bitter taste, while baking powder does not.

bacon soda in a jar with lemons and a wooden spoon.

Can You Freeze Baking Soda?

Yes, you can freeze baking soda! Baking soda is a stable, dry powder that can easily be stored in the refrigerator or freezer. Many people use it as an effective way to help reduce the spoilage of certain foods.

When freezing baking soda, it’s essential to ensure it’s stored in an airtight container. This will keep it from absorbing any moisture or odours from the food beside it. When freezing baking soda, try storing it near the back of your freezer, where temperatures are more relaxed and more consistent.

Benefits of Freezing Baking Soda

Freezing baking soda also helps preserve its chemistry—the same chemical properties that give it its unique leavening power when used in recipes remain intact even after being frozen.

That means you don’t have to worry about replacing some of the lost potency with extra ingredients when you thaw out your frozen supply of baking soda and use it in a recipe. 

Baking Soda on a board.

Wrapping Up

Baking soda, or sodium bicarbonate, is an essential ingredient in baking that helps leaven and create fluffy textures.

While it doesn’t spoil like perishable foods, its effectiveness can diminish over time, especially after opening.

To determine if your baking soda is still good, check the expiration date, look for clumps, and perform a simple test by mixing it with an acidic ingredient like lemon juice. If it bubbles, it’s still active; if not, it’s time to replace it.

To keep baking soda fresh, store it in an airtight container away from strong odors and moisture. Although it can last for years, using it within three months of opening is recommended for optimal results.

If you find expired baking soda, don’t toss it out! It can still be an effective cleaning agent for eliminating odors and freshening laundry.

By following these tips, you can make the most of your baking soda and ensure it remains a valuable staple in your kitchen.

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