This Cinnamon Bun Bread Pudding is a decadent and easy overnight brunch recipe that transforms stale cinnamon rolls into a custardy, flavorful dessert-style breakfast. By soaking cinnamon roll cubes in a rich custard made from egg yolks, heavy cream, and warm spices, then baking until golden and set, this dish captures the best parts of cinnamon buns in a comforting pudding form. Finished with a simple vanilla icing drizzle, it’s perfect for holiday mornings or special occasions.