When I made this, I used maple syrup. I imagine it will work the same way with honey, but I haven't actually tried it. I did try using some coconut sugar to see if it would dissolve into the mix; it didn't!!
So, Don't use granulated sugar!!
Your mixture won't completely combine and will probably separate a little between uses. Just shake it up to mix it together before pouring it on your ice cream. Even when it separates a bit, it still works.