Here is the full list of all 42 Overcooked! All You Can Eat achievements.
Finish 15 games in Versus Mode
Finish 15 kitchens in Arcade
Use the Flamethrower to cook 20 items
Complete The Ever Peckish Rises Campaign
Complete an Extra Trimming world
Complete the first level in all Worlds 1's
Complete Overcooked! 2 and save the Onion Kingdom... again
Discover all locations/ levels in the main games
Play Overcooked! 2-2, with 4 players all using the Rat chef
Play a level from Campfire with 4 Bear Chefs
Throw and Catch an Ingredient between 4 Alien chefs 15 times without dropping it
Play a level with 4 Reptile Chefs
Play a level with 4 players, of which 3 are the same chef
Play a level with 4 chefs wearing glasses
Play Overcooked! 4-2, with a Werewolf, a Ghost and a Vampire Chef
Win a kitchen in Versus Mode
Teleport as the Racoon
Run over Unbread 10 times
Complete a kitchen in the Mines
Throw 100 ingredients into a cooking pot
Throw 5 Tomatoes at another player
Complete a kitchen on a Balloon
Put 99 items in the bin
Play as a Aquatic creature in a Sushi Level
Pet Kevin in Overcooked! 2
Complete Overcooked! and save the Onion Kingdom
Complete Overcooked! and Overcooked! 2 tutorials
Deliver a wrong dish 10 times
Complete a kitchen in Cosmic Canteen
Have 10 tiles on fire at a time
Complete a kitchen in the Munch Mansion
Use every emote
Respawn 10 times
Push someone off a level
Get 3 Stars in a level where each player is a Box Chef. Only available in Classic Mode
Complete 5 tickets in under 30 seconds in Classic Mode
Extinguish a burning kitchen
Save An Ingredient From Burning At the Last Possible Second
Keep a finished meal 30 seconds before serving it
Complete a level in Classic Mode by doing all the recipes in order
Attempt to throw something in Overcooked!
Pet Kevin in Overcooked!