When it comes to bread puddings, different breads will yield different results. Brioche or other sweet breads will make a very sweet bread pudding, and you might be able to cut down on the additional sugar used. A hearty bread such as French bread or brioche works great in this recipe. But truly, any leftover bread works. Yes, even leftover hotdog buns. (Which we always seem to have an abundance of!) I've also seen recipes with sourdough, though I'm not a fan of sourdough, so I've never tried them. (Let me know if you've ever had bread pudding made with sourdough; I would love to know your thoughts.)