To make curd in hot or humid climates, use slightly less starter, ferment in a cooler place, and consider using a thicker milk like whole milk or adding milk powder. This helps prevent over-fermentation and a sour taste.
Making curd in hot and humid climates can be tricky because the fermentation process happens much faster. The high temperature accelerates the growth of bacteria, which can lead to over-fermentation and a sour or watery curd. Here's a step-by-step guide to ensure success:
Use Less Starter: Reduce the amount of starter (previous curd) you use. In hot weather, a tiny amount, like 1/4 teaspoon for every cup of milk, is often sufficient. Too much starter will speed up the fermentation process excessively.
Control the Temperature: Find a cooler spot in your house to set the curd. Avoid direct sunlight or placing it near a heat source like the stove. A pantry or a shaded corner of the kitchen is usually a good option.
Use Thicker Milk: Whole milk tends to set better than skim milk, especially in hot weather. You can also add a tablespoon or two of milk powder to the milk before heating it. This increases the milk solids and helps create a thicker, more stable curd.
Check Frequently: Start checking the curd after 4-6 hours. Gently tilt the container to see if it has set. If it has, immediately refrigerate it to stop the fermentation process.
Boil and Cool the Milk Properly: Boil the milk and let it cool down to lukewarm temperature. The temperature should be such that you can comfortably dip your finger in it for a few seconds. This ensures that the milk is sterilized and the starter bacteria can thrive.
If your curd consistently turns out sour, try using a clay pot for setting the curd. Clay pots help regulate the temperature and absorb excess moisture, resulting in a better-textured and less sour curd.