Start by adding 1 tablespoon of the milk at first, then add the remaining tablespoon, depending on how thin you want the consistency.
Don’t worry about sifting your icing sugar, as it will dissolve while you whisk the mixture.
If you’re not quite ready to use the glaze, just leave it over the hot water. Simply stir it again, or reheat it and use when needed
Storage
Refrigerator: if you don’t use all of the glaze, simply store it in the fridge for a week, then reheat in the microwave for about 20 seconds to use again.
Freezer: this glaze can also be frozen for up to 3 months. Simply bring back to room temperature, then reheat for 10-20 seconds in the microwave.
This is enough glaze to cover a slab cake or 24 cupcakes