1/2 c. (1 stick) butter, softened
1 c. light brown sugar
1/2 c. flour
1/2 c. rolled oats
8 c. peeled, coarsely chopped Golden Delicious apples, divided

Preheat oven to 350°F. Butter casserole dish, set aside. In a medium bowl, mix together butter, sugar, flour and oats. Place half the apples in prepared casserole dish. Sprinkle with half the crumbs. Repeat layers.

Bake in 350°F oven for 45 to 60 minutes.