How much soda per cup buttermilk in baking?

There's no set ratio of soda to buttermilk in baking, as it depends on the specific recipe and desired outcome.

Here's why:

* Buttermilk's Acidity: Buttermilk is naturally acidic. This acidity reacts with baking soda to produce carbon dioxide gas, which creates the rise and texture in baked goods.

* Recipe Needs: Recipes will usually specify the amount of baking soda needed, considering the other ingredients and desired outcome.

* Baking Soda's Strength: The amount of baking soda used will also vary depending on its strength. Baking soda can lose potency over time.

General Guidelines:

* 1 Teaspoon Baking Soda: Generally, about 1 teaspoon of baking soda is used for every cup of buttermilk.

* Adjustments: If your recipe doesn't specify a ratio, you can start with the above guideline and adjust based on the outcome. If your baked goods are too dense, you may need to add a little more baking soda. If they're too flat, you may need to reduce it.

Remember:

* Overuse of Baking Soda: Using too much baking soda can lead to a bitter taste and a soapy texture.

* Freshness: Make sure your baking soda is fresh for optimal results.

* Recipe Testing: If you're unsure, always test a small batch of your recipe before making the full amount.

If you have a specific recipe in mind, I'd be happy to help you find the right amount of baking soda!