Thanksgiving Order › Sourdough Apple Donut Cake Image 1 of 1 Sourdough Apple Donut Cake $15.00 Supremely moist 7 inch cake filled with sliced local apples, warm spices, and topped with cinnamon sugar. Add To Cart Added! Supremely moist 7 inch cake filled with sliced local apples, warm spices, and topped with cinnamon sugar.