Preheat oven to 350°F (175°C). Grease and flour Hello Kitty cake pan.
In a bowl, whisk flour and baking powder. In another, cream butter and sugar.
Add eggs one at a time, then mix in vanilla. Alternate adding flour and milk.
Pour into the cake pan and bake for 30 minutes or until a toothpick comes out clean.
Cool completely before removing from the pan.
For frosting: Beat butter until fluffy, gradually add powdered sugar and vanilla. Add pink food coloring as desired.
Level cake layers, assemble with frosting, and apply a crumb coat.
Roll and cut fondant to create Hello Kitty features: eyes, bow, whiskers.
Decorate cake and add final touches like glitter and piped rosettes.