Parse a line of Markdown, without Is there a way to parse a line of Markdown within Twig – without the surrounding 
&lt;p&gt; tags?

I see there is a StringHelper method called ParseMarkdownLine that does exactly what I'd like, but I haven't found a way to invoke it in my templates.
Have a look at the Parsedown plugin by P&amp;T, it provides a line mode to not output any wrapping &lt;p&gt; tags.

{{ entry.title|parsedown('line') }}