Butter a 2-quart baking dish. Trim the crusts and cut into ½-inch cubes:
You should have 5 lightly packed cups. Spread the bread in the prepared baking dish. If desired, scatter over the top:
Whisk together thoroughly in a large bowl:
Pour the mixture over the bread and let stand for 30 minutes, periodically pressing the bread down with a spatula to help it absorb the liquid.
Preheat the oven to 350°F.
Bake the pudding in a water bath until a knife inserted in the center comes out clean, 55 minutes to 1 hour. Serve warm with: