Which course in MBA teaches you how to write a business plan?

The relevant course in MBA program is Business Planning where they teach you the formulation of business plans

There are2 types of MBA. For mostly graduates with less tan5 years working experience of for executive above7 years experience (Executive MBA). The learning style you mentioned, is for non executive MBA. But why would you join an MBA if you still have insufficient experience in general management? Those writing business plan should not be taught. Because instead any MBA should teach you how to strategically plan a good business or evaluate a good business.