context quoted from the source.
Wanting to bake something in Sugarcube Corner for Pinkie Pie and the Cake couple, Twilight tries to find a good recipe in the book. However, after looking in the fridge and having found some leftover cotton candy the Cakes bought for Pinkie during one of their deliveriesher mind suddenly reels back to the events during Return of Harmony, as well as Discord and his cotton candy clouds.
Secretly, Twilight wanted to take a bite of those clouds when Discord had first summoned them, but she didnt want to appear Pinkie-esque. So despite being tempted because she was just so hungry, Twilight remained serious and tried to ignore the cotton candy clouds Discord had brought out before they had turned him into stone
Now having found some cotton candy in the kitchen, Twilight, after thinking much about Discord, comes up with a great new recipe.
Cotton candy cupcakes.
The recipe is a success as ponies fall in line to buy some. Mordecai drops by in Ponyville, complimenting Twilight on how awesome her cooking is. Best friends Bull and Adam, after coming from school, come to Sugarcube Corner and are amazed by the delicious cupcakes.
When Adam asks Twilight what inspired her to make such an original ideathe unicorn tries to explain little without giving off the name of Discord, fearing she would cause some sort of chaos because she still thinks about him.
Although Adam and Bull are unaware that Twilight was unintentionally referring to Discord and his cotton candy clouds.
Mordecai, who has studied abundantly about the Spirit of Disharmony and holds Twilights words of those events she and the rest of the Elements of Harmony had gone through, gets the hints. And hes slightly horrified that the girl hes crushing on is still thinking about Discord as well as baking something in remembrance to him; Mordecai has strong dislike for him even though they never met.
Lets hope he doesnt throw up. That would upset Twilight."