Start with less milk, you can always add more. You'll want the consistency as thick as you can get it, because once it's on the warm cake, it will thin out. (that's how you get the awesome 'icing running down the sides' look...which is a good look if you're a cake!)
Be sure to use glass or stainless steel containers when adding Essential oils. And be sure to use Young Living Oils when you're doing ANYTHING, especially if you're going to ingest them!
If you'd like to order Young Living Cinnamon Bark oil or learn more about Young Living, start here. :-) If you'd like to strangle me because it's time to get the holiday weight off, hang tight. Healthy recipes are down the pipeline. ;-)