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Baking Soda vs Baking Powder (and Why Recipes Use Both)

Homemade is always better

Baking Soda vs Baking Powder: Why Recipes Use Both (and What to Do If You’re Missing One)

If you’ve ever read a recipe and thought, “Why are they using both baking soda and baking powder?”—you’re not alone. It’s not redundancy. It’s baking math.

Most recipes use both because they want two different outcomes at the same time:

  • Balanced flavor + better browning

  • A reliable rise that doesn’t fall flat

Here’s the simple, mom-friendly breakdown (with the nerdy truth tucked inside).

Quick Takeaways

  • Baking soda needs acid to create lift. It also helps with browning.

  • Baking powder contains its own acid, so it provides more dependable rise.

  • Using both usually means: the recipe has some acid (great for soda), but not enough acid to fully leaven the bake—so powder finishes the job.

What Baking Soda Actually Does

Baking soda (sodium bicarbonate) is a base. It only makes bubbles (carbon dioxide) when it meets an acid.

Common acids in baking

If your recipe includes any of these, it likely has the acid baking soda needs:

  • Buttermilk or yogurt

  • Lemon juice or vinegar

  • Sour cream

  • Molasses / brown sugar (some acidity)

  • Natural cocoa powder (not Dutch-processed)

Why bakers love baking soda

When it reacts properly, baking soda:

  • Creates lift

  • Helps browning (that golden color)

  • Reduces overly tangy flavors by balancing acidity

The downside

There’s only so much acid in a recipe. Once it’s used up, the baking soda can’t keep producing lift. If you add too much soda without enough acid, you can get:

  • A soapy/metallic taste

  • Weird yellowing

  • A bake that rises oddly or collapses

Substitution guide for baking powder and baking soda ratios

Making your own scratch pantry?

If you’re building a from-scratch pantry, you’ll also want to know how to make your own homemade vanilla extract and brown sugar.

What Baking Powder Does

Baking powder is basically a “complete leavening system.” It already contains:

  • Baking soda

  • A powdered acid

  • Starch (to keep it stable/dry)

Most baking powder is double-acting, meaning it creates bubbles:

  1. when it gets wet

  2. again when it heats in the oven

Why baking powder is “insurance”

Because it carries its own acid, it gives:

  • More predictable rise

  • Better lift even when the recipe doesn’t have enough natural acid

Why Recipes Use BOTH Baking Soda + Baking Powder

 

This combo is common in:

  • Muffins

  • Pancakes

  • Chocolate cake

  • Anything with buttermilk + also needing extra rise

  • Recipes with brown sugar or cocoa

Usually the recipe is doing this on purpose:

  • Baking soda handles the acid that is present → better flavor + browning

  • Baking powder adds extra lift → reliable height + structure

If you used only baking soda

You might not get enough rise (not enough acid), or it might taste soapy if soda is left unreacted.

If you used only baking powder

You might lose some browning and flavor balance that comes from soda reacting with acid.

How to Know Which One Your Recipe Needs

Use this quick rule:

If there’s acid in the recipe…

It probably needs some baking soda.

If there’s NOT much acid (or you want extra lift)…

It probably needs baking powder.

If the recipe uses both…

It’s balancing taste + color + lift.

Substitutions (When You’re Missing One)

If you don’t have baking powder

You can make a quick homemade version if you have baking soda + cream of tartar:

DIY Baking Powder (for 1 tsp baking powder):

  • 1/4 tsp baking soda

  • 1/2 tsp cream of tartar

  • 1/4 tsp cornstarch (optional, helps storage; skip if using immediately)

Use it right away (homemade mixes lose strength if they sit around).

If you don’t have baking soda

You can usually substitute baking powder, but you’ll need more:

Swap: 1/4 tsp baking soda ≈ 1 tsp baking powder
Notes:

  • This can add a little extra tang/saltiness depending on brand

  • Works best in pancakes, muffins, quick breads

gluten and dairy free banana muffins

Baking substitutions that actually work

What If You Don’t Have Either One?

Real talk: there isn’t a perfect swap for chemical leaveners. But you can pivot depending on the recipe.

Best “plan B” options

1) Use self-rising flour (if you have it)
Self-rising flour includes baking powder + salt. Great for pancakes/biscuits-style recipes (not ideal for yeast breads).

2) Use eggs as the leavening (whip for air)
Works best for:

  • Sponge cakes

  • Some pancakes/waffles

  • Anything where you can whip whites or beat eggs/sugar well

3) Choose a different recipe type

  • Switch to yeast recipes (bread, buns) if you have yeast

  • Or choose no-leaven styles (dense brownies, cookie bars, shortbread)

“Okay in a pinch” (but don’t expect big rise)

  • Carbonated water/soda water can add a tiny bit of lift in pancakes/quick breads, but it won’t replace baking powder.

FAQ

Can I swap baking soda and baking powder 1:1?

No. Baking soda is stronger and needs acid. Baking powder is weaker but self-contained.

Why did my muffins taste bitter or soapy?

Often: too much baking soda or not enough acid to neutralize it.

Does cocoa matter?

Yes. Natural cocoa is acidic (plays well with baking soda). Dutch-processed cocoa is less acidic (often needs baking powder).

Why do gluten-free baked goods care more about this?

GF batters often need more reliable lift and structure—so baking powder is commonly used as “insurance.”

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