Take all the cream or malai of milk every day and save it in a box in fridge, then take all and start beating in clock wise with ur hand.after few minutes it's turn thick.now add cold water slowly.

And start beating continuously, then it's removed all liquid portion and thicker side remain in upper,slowly take thicker part your hand and squeeze slowly. This part save in butter box it's unsalted butter.

Now mix the salt in remain batter and beat for 1 minute, then do the same process for....you will get the salted butter.

Now the liquid part is your buttermilk,from this you can make cakes and many more,you can drink this in lunch after cooling and mixing some chat masala, it's also known as chhach.