Add introductory copy on the page I set for the posts page, twenty eleven theme

Is is possible to have a posts page with some type of explanatory/introductory copy? I have the blog page/posts page setup, but we’d like to have a paragraph or so of copy explaining what we are about and how our blog works, etc. that would appear before any of the posts show up.
So, the page layout would be:
Logo
Header image
Menu bar
Intro Copy this is what we’d like to add
New Posts
Footer

Here’s a link to our post page: https://keseed.com/?page_id=2
We want the new, static, intro copy to come directly after the black menu bar.
Thank you.