Unfortunately, Cyril's answer seems out of date? I found this alternative in the Handlebars documentation on raw blocks:
Raw Blocks
Raw blocks are available for templates needing to handle unprocessed mustache blocks.
{{{{raw-helper}}}}
{{bar}}
{{{{/raw-helper}}}}
will execute the helper raw-helper without interpreting the content.
Handlebars.registerHelper('raw-helper', function(options) {
return options.fn();
});
will render
{{bar}}