First store cream from milk every day in big Pot, every day add curd and mix well.store in fridge. After 5 to 6 days Pot will fulfilled. Cream pot keep outside till overnight. Next morning put cream in big vessel add cold water and use blender so butter and buttermilk separate then butter wash 2 to 3 times remove buttermilk.

Now gas on and put butter pot in law flame keep table spoon along. After 10 minutes to straine use strainer, pure liquid ghee will got. Now add pinch salt and betel leaf.
Your homemade ghee will not spoil long time.