Talk to this guy, to get the eggs
Official Title: Good Egg
"This is one of the five playable quests that appeared in the second Legends of Equestria stress test. This is also the second quest that Silver Platter appears in. If played correctly you will be in for quite the treat; the quest has slightly different rewards for the player depending on their actions throughout the quest" ~ KillerJH2
This quest isn't available until you complete the High Time for Pie Time quest.
Quest Walkthrough
After returning to Sugarcube Corner talk to the Shopkeeper, to start the quest. You'll be asked to collect 6 eggs from Farmer Fields at Sweet Apple Acres. You can find him located behind the barn, and he'll ask how many you want. After acquiring and bringing back the eggs, you will be rewarded with cookies and cupcakes.