I even put a cinnamon stick in my coffee when I want that ahh! This cake is light and fluffy, and it’s topped with cinnamony apples. There are lots of cinnamony crumbs on it as well because everyone knows that the best part of a coffee cake is the crumbs! To prepare the apple topping, place the apples, lemon juice, sugar, and spices in a medium-size pot over medium heat. Combine the cornstarch and water or apple juice and stir the mixture into the apples.