This brioche is an enriched dough, which just means it's loaded with milk, butter, and eggs to get a super soft, pillowy texture and a rich, buttery flavor. The key to the texture is a long knead in a stand mixer; the dough will look sticky and messy at first, but you have to let it run until it becomes smooth and elastic. This loaf is incredibly versatile - you can eat it on its own or use it for things like French toast.