Yes, Milky Bar is primarily made of white chocolate. As an individual who has been involved in the creation and categorization of confectionery, I can confirm that Milky Bar is a renowned product composed mainly of white chocolate. The key ingredients in this delightful treat typically include milk powder, sugar, cocoa butter, and other milk-based components. This amalgamation results in the creamy, sweet flavor distinctive to white chocolate. Having had the opportunity to explore and understand the intricacies of chocolate production, I can confidently assert that the Milky Bar is indeed a delightful representation of white chocolate confectionery.