Place all ingredients in a food processor, process until smooth. You can adjust milk based on desired consistency. I start with 1 TBS, add small amounts at a time if you want it thinner. You can add more coconut oil if you add too much milk.
Use the glaze right away. it will solidify after an hour or so. If this happens, heat for about 30 seconds to soften before drizzling or piping.
Extra glaze will keep in the fridge in a covered container for up to two weeks.