The plural form of platter is platters.

What platter means?

: a large plate that is used for serving food and especially meat. : the food that is served on a platter. : a meal in a restaurant that has a particular type of food.

What's the difference between plate and platter?

As nouns the difference between plate and platter

is that plate is a flat dish from which food is served or eaten or plate can be precious metal, especially silver while platter is a tray for serving foods or platter can be one who plats/plaits or braids.