Sourdough brioche bread is a type of enriched bread that contains butter, eggs, and milk, making it richer and softer than regular bread. It is also naturally leavened with sourdough starter, which gives it a slight tang and makes it easier to digest. Sourdough brioche bread can be baked as a loaf, braided, or made into rolls or other shapes. It is delicious on its own, with jam, or as a base for other recipes like French toast or cinnamon rolls.