Gwen Stefani is looking to build a new holiday tradition. Growing up in Southern California, the singer watched her maternal grandmother craft entire gingerbread villages, she recalled during an interview at the December 7 Spotify listening party for her album You Make It Feel Like Christmas. Every year, said Stefani, she and her three siblings would get their own house “and we would take it home and eat it.” But when she tried to re-create the moment with her three sons — Kingston, 11, Zuma, 9, and Apollo, 3 — it was a disaster. “It was a horrifying taste — I don’t even know how I did it,” she said at the Fred Segal and Domino magazine–hosted event. “I think I used the wrong molasses, so I’m trying to figure…