Complex sentence: It is served famously at Morning Call, Café du Monde and the coffee shops in New Orleans, Louisiana--where the drink uses coffee combined with roasted chicory root, which is then mixed in equal amounts with hot milk.
Split into simpler sentences: It is served famously at Morning Call, Café du Monde and coffee shops throughout the area in and around New Orleans, Louisiana, where the drink uses coffee combined with roasted chicory root. The fortified coffee is then mixed in equal amounts with hot milk.