During the Food Festival event in Tarisland, you can open Gourmet Chests around the world to store the recipes for the festive meals and earn Rainbow Candy. These chests are located in the most hidden places and can be tricky to find without hints.
Tarisland – All 12 Gourmet Chests locations (Food Festival event)
There are 12 Gourmet Chests in the Food Festival event, four in each of the following areas: Ancash Canyon, SilverLit, and Misty Forest. Each chest requires you to have a specific Pure-quality meal in your inventory to open it. If you're reading this in the early days of the event, you may not be able to open all of them as the recipes are time-sensitive.
Here you will find all Food Festival locations in Tarisland with coordinates and required meals.
The first chest is directly behind the chief's tent in the Ancash Tribe. Use the Ancash Tribe waypoint, then follow the road north to the tent and go around it. You'll see the chest on top of the nearest guard tower. Use your mount to jump up onto the tower and open it.