NOTE 1: I made the crumble topping, pie filling, and cupcakes the day before I needed them. Just prior to serving, I filled them, made the buttercream, and iced them then sprinkled on the crumble. Making most of the components a day or two in advance will make these super easy for you!
NOTE 2: If you don't have any cake flour, you can make your own. Just remove 2 Tablespoons of flour from each cup. Then replace those 2 Tablespoons of flour with 2 Tablespoons of cornstarch. Mix well.
Keyword apple pie, buttercream, cake, cupcakes, fall baking, fall dessert, icing