Preheat oven to 375F.  In a food processor, puree the apples with a little buttermilk.  In a mixing bowl combine sugars, oil buttermilk, eggs, vanilla, molasses, apples and cinnamon.  Add the flour and walnuts and mix.  Place in a greased 13×9 pan.  Top with the streusel and bake about 40 minutes or until a toothpick comes out clean.

In a food processor, combine first 4 ingredients.  Add butter a little at a time until the topping comes together slightly.