Baker's Help:How can I change a chocolate cake recipe to a vanilla one?

What is the best way to change a chocolate cake recipe to a vanilla one without making it too doughy? Keeping it vegan is important, as is totally foregoing chocolate ingredients.

Ingredients as follows:
1½ cups all-purpose flour
1 cup white sugar
½ cup cocoa powder
1 teaspoon baking soda
½ teaspoon salt
⅓ cup vegetable oil
1 teaspoon vanilla extract
1 teaspoon distilled white vinegar
1 cup water or coffee

Thank you, you talented gelatinous bakers you!