Books with title Cupcakes vs. Brownies

Zimmah the djinn isn't evil. He simply thinks the world would be more fun if everything was made of desserts. So when ten-year-old Karim Jacobs makes a wish to fix his parent's marriage it's not Zimmah's fault that he twists the wish. He couldn't help himself. Candypunk airships and cupcake castles are cool! Of course Karim isn't happy about his wish going astray, specially when running into fantastical creatures like gummy-grizzly-bears and rock candy beasts; and although he desperately wants to go home, he finds himself in the middle of a war between the Cupcake Kingdom and Brownie Kingdom. With his parents lives in danger, its up to him to stop Zimmah and restore the world to normal. This epic, coming of age fantasy is the first in new middle grade series focusing on djinn, genies and world warping magic!