Baking soda is a powerful leavening agent that makes baked goods rise, but it also changes their texture, color, and flavor.

Quick Scoop: What does baking soda do in baking?

1. It makes things rise (leavening)

  • Baking soda (sodium bicarbonate) reacts with acids in the batter (like buttermilk, yogurt, vinegar, brown sugar, lemon juice, cocoa) to create carbon dioxide gas.
  • Those gas bubbles expand in the heat of the oven, pushing the batter up and giving you a lighter, airier structure in cakes, muffins, quick breads, and cookies.
  • This reaction starts as soon as the wet and dry ingredients meet, so batters that rely on baking soda should go into the oven promptly for best lift.

Think of it as tiny balloons forming inside your batter, then expanding in the oven.

2. It tenderizes and affects structure

  • By raising the pH (making the batter more alkaline), baking soda weakens gluten, which can make baked goods more tender and give them a more open, slightly looser crumb.
  • With just enough baking soda, you get a soft, pleasant texture; with too much, the structure can become weak, causing cakes to spread instead of rise tall.

A classic example is cookies: a bit of baking soda helps them spread and stay tender rather than becoming dense.

3. It changes color and browning

  • Baking soda raises the pH, which speeds up browning reactions (like Maillard browning), so baked goods tend to brown more deeply and develop richer flavor.
  • This is why it’s often used in recipes where you want good color in a short bake time, like cookies and pretzels.

For example, soft pretzels are traditionally boiled in a baking-soda solution before baking to get that deep brown, flavorful crust.

4. It influences flavor

  • Used correctly, baking soda neutralizes some of the sharpness of acidic ingredients and can subtly round out flavors.
  • Used in excess, it can leave a distinct soapy or metallic aftertaste, which is why recipes call for small, precise amounts (often around 1/4 teaspoon per cup of flour).

So it’s not just “for puff”; it also balances acidity and flavor.

5. Why some recipes use both baking soda and baking powder

  • Baking soda needs acid to react; baking powder already contains both an acid and a base, so it works even in less acidic batters.
  • Some recipes include both because:
    • They need more total leavening than the available acid can support.
* They want to keep some tang from ingredients like buttermilk while still getting enough lift.

Example: Buttermilk pancakes may use baking soda (to react with some of the buttermilk) plus baking powder (for extra rise and to preserve some tangy flavor).

6. Practical tips for using baking soda

  • Pair it with an acid: buttermilk, yogurt, sour cream, brown sugar, honey, molasses, cocoa (natural), vinegar, citrus juice.
  • Don’t overdo it: more doesn’t mean higher rise; too much weakens structure and hurts flavor.
  • Bake soon after mixing: the gas release starts immediately upon hydration and acid contact.
  • Store it dry and sealed: old baking soda can lose strength, leading to flatter, denser baked goods.

7. Short forum-style summary

In baking, baking soda is your on-demand gas generator: it reacts with acids to produce bubbles that lift your batter, while also making things more tender, promoting browning, and subtly tweaking flavor—as long as you use the right amount and get it into the oven quickly.

Bottom note: Information gathered from public forums or data available on the internet and portrayed here.