Brown the butter first to get more complex caramel notes in the filling. To brown butter, melt it over medium-high heat and simmer, stirring every 30 seconds until it goes quiet and starts foaming, then look for lightly browned specks.
Warm up the cinnamon sugar butter before spreading it over the dough to make it drizzling consistency.
You can top this focaccia with a cream cheese icing if preferred instead of the suggested glaze.
Brush the glaze on top, sides, and bottom of the focaccia for full coverage.