Makhni gravy, also known as butter gravy, is a rich and creamy sauce commonly used in Indian cuisine. It is made with a combination of tomatoes, butter, cream, and various spices. The sauce is typically used in dishes like butter chicken (murgh makhani) and paneer makhani. Makhni gravy adds a smooth and velvety texture to dishes and enhances their flavor with its rich and decadent taste.