19/03/2026
Baking Powder vs Baking Soda, What’s the Difference?
This is one of those baking questions that keeps coming up, especially for beginners.
The two look similar. They are both white powders. They are both used to help baked goods rise.
So it’s easy to assume they do the same job.
But they do not work the same way, and using the wrong one can change the result of your bake.
•••
Let’s start with baking soda.
Baking soda is pure sodium bicarbonate.
For it to work properly, it needs an acid.
That acid could come from ingredients like:
• yoghurt
• buttermilk
• lemon juice
• vinegar
• natural cocoa powder
• brown sugar, in some recipes
When baking soda meets acid and moisture, it starts producing carbon dioxide gas.
That gas creates bubbles, and those bubbles help the batter or dough rise.
So if a recipe uses baking soda, it is usually because there is an acidic ingredient in the recipe that needs to be balanced and activated.
•••
Now let’s look at baking powder.
Baking powder already contains baking soda, but it also contains acid.
That means it does not need an extra acidic ingredient in the recipe to work.
Once it gets wet and heated, it starts releasing gas and helps the batter rise.
This is why baking powder is often used in recipes that do not contain enough acid on their own.
It is a more complete leavening ingredient.
•••
So in simple terms:
Baking soda needs acid to work.
Baking powder already comes with the acid it needs.
That is the main difference.
•••
Now here is where people get confused.
They think they can swap one for the other.
Sometimes they can, but not directly, and not without changing other things in the recipe.
If you use baking soda in place of baking powder without enough acid present, the bake may not rise properly.
It can also leave a bitter or soapy taste behind.
If you use baking powder in place of baking soda, the bake may rise differently, and you may also lose the effect the soda was meant to have on browning, flavour, and balancing acidity.
So even though both are leaveners, they are not always interchangeable.
•••
There is another detail worth knowing.
Baking soda is stronger than baking powder.
You usually need less of it.
That is why a recipe may call for 1 teaspoon of baking powder but only 1/4 teaspoon of baking soda.
It does not mean the soda is too small to matter.
It just means it is more powerful in smaller quantity.
•••
Some recipes even use both.
Why?
Because each one is doing something slightly different.
The baking soda reacts with the acidic ingredient in the batter.
The baking powder gives extra lift.
Together, they can improve rise, color, and texture.
This is common in things like cakes, muffins, and quick breads.
•••
So when you see one in a recipe, do not just focus on the amount.
Ask why it is there.
If the recipe contains an acidic ingredient, baking soda may be there to react with it.
If the recipe does not contain much acid, baking powder may be doing the lifting on its own.
And if both are present, each probably has a role.
•••
The short version is this:
Baking soda needs acid.
Baking powder already contains acid.
Both help baked goods rise, but they do not behave the same way.
So no, they are not the same thing.
End of post.
As always, I hope this helps someone.
Have you ever accidentally swapped one for the other before?
