Does royal icing go bad?
Royal icing can last for up to three days when refrigerated. Royal icing can last longer than three days when stored in the fridge, but for best results, try to use or eat it within those three days.
How far in advance can I make royal icing?
You can prepare this royal icing 2-3 days ahead of time. I recommend transferring it to a smaller bowl or container and tightly sealing for up to 3 days in the refrigerator. When you’re ready to use it, let it come to room temperature, then mix it up with a whisk a few times as it may have separated.
