kitchen supper

noun2

1. •
   An informal or semiformal meal served for guests, not necessarily one served in the kitchen.

   • The couple threw an impromptu kitchen supper when the dinner reservations fell through.
2. •
   (old-fashioned) The evening meal for servants, separate from the family's meal.

   • The cook prided herself on making the kitchen supper as delicious as the family's dinner.