Good alternative to making them from scratch

I bought these when they were on sale one day and they sat in my cupboard until I needed to bring something for my work potluck.

They were very easy to make, though a little time consuming as you have to cool between layers. Overall, they tasted great with a really rich, buttery taste and my co-workers enjoyed them.

There was too little filling for my liking, the filling thickness in mine did not look like the picture on the box. They only took a few ingredients (eggs, milk and butter) and they are a great option for holiday parties.