Mix the cranberry sauce, xanthan gum and Swerve in a mixing bowl. Spread over the crust.
To Make the Crumble Topping
In a separate bowl, add all the crumble topping ingredients, except for the Swerve brown and butter, and whisk. Mix in the Swerve brown and melted butter.
Sprinkle the crumble over the top of the cranberry filling and bake for another 30-35 minutes or until the topping is golden. Allow to cool before cutting into bars. Store leftovers in the fridge or freezer in an airtight container.
I cut into mine a little early (for the video) and the filling was a little softer, so I would allow them to fully cool and even refrigerate before cutting up and serving them. Once they set, they hold together perfectly and they are truly a real treat! The crumble topping is ah-maz-ing!!