In a medium bowl, add the Milk Chocolate Chips, and Heavy Cream.
Place in the Microwave, and microwave at 15 second intervals, stopping every 15 seconds to stir the chocolate. If the Chocolate becomes thick, add a little more Heavy cream, and stir until smooth, and continue until the chocolate is completely melted. When the chocolate is melted completely, add the Butter, and stir well, until blended, and the chocolate is smooth and shiny.
Remove the Cake/Cheesecake from the refrigerator, and pour the Ganache over the top of the Cake/Cheesecake, letting it run down over the edges, and coating the top. Place the Cake/Cheesecake back in the refrigerator, and leave overnight for best results.
When time to serve, cut in 2 inch pieces, serve, and Enjoy! Serves 12-14.