Combine the soymilk and vinegar in a medium bowl, let stand 10 minutes to curdle. Add oil or applesauce, yogurt and flavorings.
In a larger bowl, mix together flour, baking soda, salt, and sugar. Add wet ingredients to dry, mix well.
Pour into prepared pan (I like a bundt cake pan for this one), and bake at 350 until cake springs back when poked.
This tastes a lot like a doctored cake mix cream cheese cake I used to make before I was vegan. It's good served with fresh berries or drizzled with a little icing.