You can replace the raisins with chocolate drops or M&Ms® and use the leftover condensed milk to make a second batch the next day!
Amazingly morish biscuits. I added chopped nuts and chocolate and made 3 batches , 2 to freeze and one to eat that day, EVERYONE loved them. I am about to make another huge batch for the freezer - which works really well as I work long hours and it's nice for teenagers to have something they can bake when they get home from school. - 15 Nov 2015