In brief
The source’s Boston Cream Pie is a cake with sponge layers, cream filling and chocolate topping. Its name does not mean a conventional fruit pie with rolled pastry.
Useful to know
The source’s Boston Cream Pie is a cake with sponge layers, cream filling and chocolate topping. Its name does not mean a conventional fruit pie with rolled pastry. [1]
Look at assembly rather than relying on one word in the title. Filling temperature and consistency matter between layers. The components need different preparation before becoming the finished dessert.
Sources
For further detail and to check the information: