I wanted it a little bit sweeter, so I added a bit of Caramel to it. After let it steep for a few weeks, which I interrupted with a lid-off period of a couple hours here and there, it seems to be okay!

Based on this recipe (which is delicious, so thank you Ken O'Where!):
e-liquid-recipes.com/recipe/149205/Butter+Rum+Candy

Original Description:
This is another of my early recipes, one that i still love. Butter Rum Lifesavers are one of my all time favorite candies and this is a good imitation. Due to the heavy chemical smell of the Butter Rum it will require at least two weeks curing time, leaving the lid off will release the good smell and the bad so a lengthy curing is an alternative. Several people told me its a great shake and vape, i disagree but you may want to try it right away as you may be in the group that likes it fresh.

Hope you enjoy!