I am not knowledgeable in haiku very much even if I invited once a Haiku panelist to attend a convention I held back in May....didn't have time to listen to it though.
As for your haiku, it offers a nice blend of colors that go well together. It's short as like all other haiku, which can't be really changed. I feel a sens of movement in the poem that goes from making an action to then being rewarded with something sweet. Though it can also mean that people wearing a bow tend to be attracted to blue cupcakes...or...I'm thinking too much. All in all, it is as the title says, a cute haiku poem!