It doesn't get any better than this. Serve this eclair pastry and you instantly rise to superhero status. Never met anyone who didn't adore the Boston Cream Éclair Cake!
Make all at once, or in stages and construct it the morning you serve.
Use a pastry bag and decorating tip to pipe your chocolate icing, or snip a hole in the corner of a ziploc bag.
There will be lots of extra filling. Save it for another use or get out your spoon for a treat.