So far as I consider, Recent post widget is not yet available on default widgets on blogger. WP guys however are leveraged with this widget. Recent post widget helps your blog in two ways. Firstly it create audience engagement with your blog and secondly it inform the perspectives about what you recently have written on your blog. You can fetch posts from other blogs as well but only in case where you're sure that the feed address you're entering is correct.
Recent Posts with Snippet
<div id="hlrpsa">
<script src="https://googledrive.com/host/0B9z9HCzVzJW4UEo0RkVwMmxzUzg">
</script>
<script>
var numposts = 5;var showpostdate = false;var showpostsummary = true;var numchars = 100;var standardstyling = true;
</script>
<script src="http://blog-address.com/feeds/posts/default?orderby=published&alt=json-in-script&callback=showrecentposts">
</script></div><a style="font-size: 9px; color: #CECECE; float: right; margin: 5px;" href="http://helplogger.blogspot.com/2012/04/simple-related-posts-widget-for-blogger.html" rel="nofollow" >Recent Posts Widget</a>
<noscript>Your browser does not support JavaScript!</noscript>
<style type="text/css">
#hlrpsa a {color: #0B3861; font-size: 13px;}
#rpdr, #rpdr a {color:#808080;}
#hlrpsa { color: #999999; font-size: 11px; border-bottom:1px #cccccc dotted; margin-top:-10px; padding-bottom:10px;}
.hlrps a {font-weight:bold; }
.hlrpssumm {}
</style>
Only Title Recent Post widgets
<div id="hlrpsb">Note : Make sure to change the blog-address.com in given snippets with your own blog URL.
<script style="text/javascript" src="https://googledrive.com/host/0B9z9HCzVzJW4UzA5ZFJYdENQcHc"></script>
<script style="text/javascript">var numposts = 10;var showpostdate = false;var showpostsummary = false;var numchars = 100;var standardstyling = true;</script>
<script src="http://blog-address.com/feeds/posts/default?orderby=published&alt=json-in-script&callback=showrecentposts"></script></div><a style="font-size: 9px; color: #CECECE; float: right; margin: 5px;" href="#" rel="nofollow" >Recent Posts Widget</a>
<noscript>Oops! Make sure JavaScript is enabled in your browser.</noscript>
<style type=text/css>
#hlrpsb a {color: #0B3861; font-size: 13px;}
#rpdr, #rpdr a {color:#808080;}
.bbrecpost2 {
padding-top:6px;
padding-bottom:6px;
border-bottom: 1px #cccccc dotted; }
</style>
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