Preheat oven to 350°.

Place 1/2 cup butter into a heavy cast iron skillet and melt butter in the oven. Remove skillet and sprinkle with brown sugar; return to oven to heat while you prepare the apples.

Remove skillet, and place 1 refrigerated pie crust on top of the brown sugar. Top the pie crust with half the sliced apples. Sprinkle apples with 1/2 cup of sugar and 1 teaspoon of cinnamon; place a second pie crust over the apples; top the second crust with the remaining apples and sprinkle with 1/2 cup sugar and 1 teaspoon cinnamon. Top with the third crust; brush with melted butter, sprinkle the top crust with 1/4 cup sugar. Cut 4 slits into the top crust for steam.

Bake in preheated oven until the apples are tender and the crust is golden brown, about 45 minutes.

Serve warm.