I don't have a clue what the \/ \/ is in your path came from.
Code
RewriteRule ^/?$ "https\:\/\/www\.EXAMPLE\.com\/" [R=301,L]

But I guess it works

What was wrong with isaacs method:
Code
RewriteEngine On
RewriteCond %{HTTPS} off
RewriteRule (.*) https://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]

Or just using gizmos method of cloudflare.

Blue Man Group
There is no such thing as stupid questions. Just stupid answers