This line comes from Boast Busters, an early episode of My Little Pony: Friendship Is Magic, where Snails, one of the young unicorn colts, delivers it with cheerful sincerity. The moment was lifted from the episode and shared as a short standalone clip on soundboards, where fans of the show kept it alive as a lighthearted reaction sound. Its appeal comes from the contrast between the grand fantasy world of Equestria and such an ordinary, wholesome love of pudding, making it an easy shorthand for innocent enthusiasm in memes and edits.