I thought I could duplicate a Boston Cream Pie in a Cupcake. You probably could if you were willing not to cut corners. Negative on this try. Although, when you try and replace pastry cream with Jell-O vanilla pudding made with heavy cream, you can figure out why! A nice dessert and I am sure many 7 year old's would enjoy them, but no substituting pastry cream!
Also very difficult to pipe with a piping bag. The chocolate does cover up the holes pretty good!