How do you test purity of khoya?

1. Look for a smooth texture. Pure khoya should have a smooth and consistent texture. If there are any lumps or grains, it may be a sign that the khoya has been adulterated with other ingredients.

2. Check the color. Pure khoya should be white or light yellow in color. If the khoya is brown or has a grayish tinge, it may be a sign that it has been mixed with other ingredients.

3. Smell the khoya. Pure khoya should have a sweet and milky smell. If the khoya has a sour or off smell, it may be a sign that it has been spoiled or adulterated.

4. Taste the khoya. Pure khoya should have a sweet and creamy taste. If the khoya is bitter or has a strange taste, it may be a sign that it has been adulterated.

5. Do a flame test. To perform a flame test, hold a match or lighter near the khoya. If the khoya burns with a bright blue flame, it is a sign that it is pure. If the khoya burns with a yellow or orange flame, it may be a sign that it has been adulterated with ghee or other fats.

It's important to note that these tests are not foolproof and may not always be able to detect adulterated khoya. If you are concerned about the purity of khoya, it's best to purchase it from a reputable source.