How to tell if dosa batter is properly fermented?

Question

Discover the key signs that indicate dosa batter is ready to cook.

Answer 1

Properly fermented dosa batter will have increased in volume, have a slightly sour aroma, and exhibit small air bubbles throughout. The batter should also be light and fluffy.

Detailed Explanation:

Fermentation is a crucial step in making delicious, crispy dosas. Here's how to determine if your batter has fermented correctly:

1. Volume Increase: A noticeable increase in volume is a primary indicator. The batter should have risen significantly, typically doubling in size. This is due to the production of gases by the fermenting microorganisms.
2. Aroma: The batter should have a slightly sour, tangy smell. This is a result of the lactic acid produced during fermentation. If it smells overly pungent or rotten, it's likely over-fermented or spoiled.
3. Air Bubbles: Look for small air bubbles throughout the batter. These bubbles are a sign that the microorganisms are actively producing gas, which contributes to the light and airy texture of the dosa.
4. Texture: The batter should be light and fluffy. When you stir it, it should feel airy and not dense or heavy.
5. Taste Test (Optional): You can taste a tiny amount of the batter. It should have a slightly sour taste. However, this is not always necessary and should be done cautiously.

If your batter exhibits these characteristics, it's likely properly fermented and ready to use for making dosas. The fermentation time can vary depending on the temperature and humidity of your environment, typically ranging from 8 to 24 hours.

Pro Tip:

If your batter ferments too quickly, you can refrigerate it to slow down the process. This prevents over-fermentation, which can result in overly sour dosas.