[header] How to make dahi [title] Use whole milk, rather than diluted milk or low fat milk. [step] Using milk other than whole milk will create a curd that does not set properly and it will be watery, rather than firm. [substeps] If you use homogenized milk, you will need more yogurt, as the milk is processed and the particles in the milk have been broken down. 
If you use non-homogenized milk, you will need less yogurt as the dahi will set well. Adding too much yogurt will make your dahi very sour.