I am making a Xmas cake for my mom's tree trimming party and I wanted to get started on the RI snowflakes. I am attempting Alton Brown's RI recipe which calls for pasteurized egg whites instead of using my usual meringue powder (because I'm out and I'd have to pay horrendous shipping to get more).
Can I make the snowflakes now if the party is on Dec 22? Will they still be safe to eat?
Do them now and let them dry out completely. Then store them in a closed paper box.
I have used those organizers that are sold for guys to use in their workshops--these work very well. The idea is to keep light and humidity away from dried royal icing.
They will store forever.