In a saucepan, melt butter and xylitol (or Gentle Sweet) over medium high heat.
When sweetener has completely melted, continue to simmer for 1-2 minutes, stirring continuously to prevent scorching.
Add maple flavoring, mineral salt and heavy whipping cream.
Continue to simmer for 1-2 more minutes, still stirring continuously.
The sauce should start to thicken a bit, but it will still be quite thin. It will thicken more as it cools.