1. If you feel the burfi is not firm and is like a fudge, just put it back in the pan and stir for few more minutes and spread it again.
2. ensure the besan is roasted else raw smell will be there.
3. My mother in law will add 2 tblsp of sugar in the last to get firm the 7 cup burfi.
4. This tip will work for any burfis.