According to this photo from October, fudge is still a snack credit. http://www.wdwmagic.com/shopping/ma...-main-street-confectionary-overview/25722.htm
However, I don't know if you can "combine" using snack credits with the quantity discount. (Also, FWIW, when I bought some fudge a year or two ago, it was "Buy 6 Pieces, Save 33%", and not "B3G1 Free". It was the equivalent of "B4G2 Free".)