Preheat oven to 350 degrees F.
Grease Bundt pan with non-stick baking spray.
In a bowl, mix flour, baking powder, sugar and salt.
In another bowl, mash bananas. Mix in eggs, margarine, vanilla and soy milk.
Slowly combine dry ingredients with wet ingredients. Mix for about 2 minutes. Be careful not to over mix.
Stir in chocolate chips and pour into prepared Bundt pan.
Bake at 350 degrees for 45 to 55 minutes, until a skewer inserted in the cake comes out clean.