Recent Posts using Blogger Feed Widget

You can use the Blogger’s Official Feed Gadget to act as a Recent Posts Widget. Here are the Steps to Do it

1. Login to Blogger Dashboard and Go to Design > Page Elements (or Layout)

2. Click the Add a Gadget Link, and Add a Feed Gadget From the Popup Window

3. The Feed Gadget can display a maximum of 5 posts

In the Feed URL filed, give the URL as

http://yourblog.blogspot.com/feeds/posts/summary?max-results=5

(after editing it with your Blog URL)

As I have a Custom Domain blog,  I would use

http://www.bloggerplugins.org/feeds/posts/summary?max-results=5

as the feed URL

4. Once the Feed is retrieved, adjust the Gadget Settings and Save the Gadget.

5. Now you should see the Recent Posts Widget on your Blog

Source: http://www.bloggerplugins.org/2011/06/recent-posts-using-blogger-feed-widget.html