Ingredients 101: Use Baking Soda to Neutralize Bitter & Sour Flavors in Food

Use Baking Soda to Neutralize Bitter & Sour Flavors in Food

Baking soda is a powdery miracle. Not only is it the secret ingredient to making mashed potatoes fluffy, it can help you make authentic-tasting soft pretzels at home and caramelize onions in half the time. It's actually got lots of surprising uses you might not know about, and one of them is that a pinch or two can correct sour and bitter tastes in your food.

This old baking soda "meets all requirements of U.S. Pharmacopoeia". Image by katzenfinch/Flickr

Where Baking Soda Falls on the pH Scale

The pH measurement determines whether a substance is an acid or a base on a scale from 0 to 14. Acidic falls into the 0 to 6 range, while 7 means neutral (which is also the pH of water), and 8 or higher indicates an alkali, or a base. On the pH scale, baking soda is a 9.

Meanwhile, lemon juice and vinegar rank as a 2 on that same scale, so you can glean for yourself that acidic foods are pretty mouth-puckering. However, when baking soda is added to a dish, it neutralizes those acids. That's why one of sodium bicarbonate's common uses was as a stomach antacid for many years.

Some common substances and their place on the pH scale. Image by Michael Lee/Historica Canada

For a full explanation of what pH measures and the chemical definition of acids and bases, check out the ChemWiki.

The University of Wisconsin Extension writes, "Because of its chemical makeup, baking soda has unique capabilities as a buffer. Buffering is the maintenance of a stable pH balance, or acid-alkali balance. As a buffer, baking soda tends to cause acid solutions to become more basic and to cause basic solutions to become more acid, bringing both solutions to a stable pH around 8.1 (slightly basic) on the pH scale. A buffer also resists pH change in a solution, in this case maintaining a pH of 8.1."

When Can You Use Baking Soda to Fix Acidic Foods?

So, if you've added too much vinegar to a salad dressing or lemon juice to a marinade, or cooked tomatoes only to discover that they're super tart, you can add a pinch (but just a pinch—too much and you'll get a very soft, weird taste in your food) of baking soda and it should take the rough edges off the taste.

Dishes that use tomatoes, like chili, pasta sauce, or bruschetta, can run the risk of tasting too acidic. Image by naotakem/Flickr

Some Redditors point out that you can try adding sugar first to a too-tart recipe (or even add a grated carrot or raisins since they're high in sugar), but in my opinion, sugar can sometimes actually bring out the flavor of something acidic unless you add a lot of it, which would just ruin your dish altogether.

So Just How Much Soda Is Enough?

Chowhound users have mixed feelings on the topic, but many of them have tried the baking soda trick and liked it.

Again, they emphasize that a very small amount is usually all it takes, and not to be surprised if you see some foaming when you add the baking soda—it's chemically reacting with the acid in your food.

The Kitchn went so far as to add several tablespoons of baking soda to rescue four gallons of chili.

If your chili is on the mouth-puckering side, baking soda can repair that. Image via A Cozy Kitchen

Meanwhile, Dr. Gourmet (aka Dr. Timothy S. Harlan), a physician and TV commenter, says to use 1/4 teaspoon of baking soda to every cup of tomato sauce to neutralize any acid.

I experimented by adding 2 tablespoons of lemon juice to about 6 ounces of plain iced tea. I tasted it, winced, and had to drink some water. Next, I added 1/8 of a teaspoon of baking soda and stirred well. It definitely neutralized the mouth-puckering effect of too much lemon juice, and I didn't need as much honey to get the iced tea to just the right level of sweetness that it might have otherwise required.

Just a little bit of baking soda is enough to take away the sting from lemon juice. Image via Shutterstock

I probably could have added more and been fine, but I played it safe instead. I say experiment and find out what works for you.

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Cover image via Uncultivated Chef


About lemons, they are acidic but once consumed they are alkaline in nature. In other words they make you body more alkaline in ph (same goes for vinegar)

I ran into a problem recently with marinade ..... it tasted perfect when I first put it on the meat in the slow cooker but after 2 hours i went back to taste it and the vinegar was overwhelming. If you can, dont use baking soda rather reserve some of the juices/marinade and set aside, discard the rest. Rinse off your meat and replace the marinade with water, garlic, onions, and alittle salt. If you like add some black pepper or mild red chili powder. After some time depending on what your cooking add some of the reserved stock and vola.

There is no way in the universe that acetic acid (Vinegar) has the same PH or bigger than the Citric acid (Lemon juice).

I'm surprised that you have confused sour and bitter! So, we can see that baking soda neutralises acidic tastes, but what does it do for bitter ones?

Wanting to know what helps with the bitterness in fresh made Lemonade "Not" the acidity...thank you

ok, i take a lot of shortcuts in my chicken gumbo. i use the leftover carcass from a grocery store roasted chicken, fresh sauteed onions, garlic, and celery, picante sauce, and a few spices from my pantry. today, i decided that my gumbo needed more tomato flavor so i added a can of crushed tomatoes. ooh! that was a bad move. that can of tomatoes tasted more like the can than the tomatoes. so i decided to check out the internet. am i going to be sick? but, no. i should be fine and i was really surprised! a teaspoon of baking soda completely got rid of the nasty metallic taste in my chicken gumbo. i was ready to throw the whole pot out because that metallic taste made me nauseous. one of my personal number one fears is food poisoning.

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