¾ cup butter (1 ½ sticks) (Land O’ Lakes or Horizon Organic)
Butter Frosting or 1.5 times recipe
The frosting is a little thin because of all the butter so it's easiest to make the cake in a pan instead of a layer cake, but a layer cake is still doable. Or you could use chocolate frosting instead.
Here's a bunny cake I made for my son's 2nd birthday.