If bread pudding is mostly bread, it makes sense that the better your bread, the better the pudding. I usually make my bread pudding with challah, the way Luther liked it best. For this book, I decided to mix things up a little. This recipe uses raisin-cinnamon bread for that hint of spice I love. The big secret, as with all bread pudding, is to use stale bread; otherwise, it will disintegrate in the custard.