Peel, core, and cut all apples into ½” wedges. Mix together all filling ingredients and fold into apples. Pour apple mixture into a 9×13 baking dish. Mix together all of the ingredients for the topping until all the butter is thoroughly incorporated. After placing apple mixture in the dish, sprinkle crumb topping on top to cover.
Place cobbler in the oven, and turn up heat to 425°. Cook for 15 minutes then reduce heat to 375°. Cook for 35 minutes after turning down the heat. Remove from oven and let cool for 20 minutes before serving. Spoon generous helpings into a bowl and top with your favorite ice cream.