Always boil the mixture on medium flame.
No hurry in making this fudge because at high flame, the milk solids will settle at bottom and this will burn on high flame.
The colour of the amruthaphala burfi or fudge tends to change from cream to almost light brown.
The colour also depends on the intensity of flame. If the entire procedure is done on low flame, the colour remains white otherwise the colour changes from cream to very light brown on medium flame.
It is important to make markings on the burfi when it is still hot otherwise we don’t get perfect pieces and they tend to break.