Serving cake and ice cream for a large party can be stressful. Scooping ice cream takes time and you want to get your guests cake and ice cream before the ice cream melts.
Our friend Aaron taught me a trick a few years ago that saves time and relieves some stress. Instead of scooping ice cream "a la minute" scoop it in advance. Simply take foil lined baking cups line a baking sheet, put a scoop of ice cream into it, repeat until the tray is full, cover and freeze.
When it is time to serve dessert, simply grab a baking cup of ice cream and set beside the cake.