Do you leave royal icing over night?

Yes, you can leave royal icing overnight, especially if you're allowing it to dry after decorating cookies or cakes. However, it's best to cover it tightly with plastic wrap or store it in an airtight container to prevent it from hardening or drying out. If you need to store it for a longer period, refrigeration can help preserve its consistency. Just remember to re-beat it gently before use if it thickens.