Take a deep bowl and a strainer.
Place the muslin or cotton cloth over the strainer.
Pour yoghurt into a muslin cloth.
Gather the cloth edges and squeeze it lightly, tie the edges of the cloth.
Now keep this whole thing in the fridge for at least 5-6 hours.
Place it in the refrigerator otherwise, the yoghurt will become sour.
After 5-6 hours, all the liquid/whey has been drained out.
Only thick hung curd or chakka will leave.
The hung curd is ready, then refrigerate and use as required.