there are a lot of recipes online for a vegan chocolate cake uses vinegar as an ingredient i think it would fit and work well and it tastes really good and is super easy to make. one variation is found here http://www.egglesscooking.com/2009/0...hocolate-cake/

it doesn't taste vegan. i used to make it whenever i had an occasion for cake because it is so simple. there may be versions online that make less. also i have used any type of vinegar i had on hand and it has never seemed to make any difference.