01 -
In a medium saucepan, whisk together the apple cider, unsalted butter, apple butter, and brown sugar.
02 -
Bring the mixture to a boil over medium-high heat, whisking continuously for 1 minute.
03 -
Remove the saucepan from heat and whisk in the dark spiced rum.
04 -
If preferred, strain the mixture through a fine mesh strainer to remove any solids.
05 -
Pour the hot buttered rum into a mug, garnish with dried apple slices and a cinnamon stick if desired, and serve warm.