Skillet Apple Crisp

Preheat oven to 375°F.
Combine apple filling in a bowl and toss until apples are fully coated. Set aside.
Combine streusel topping in a separate bowl and toss until mixed. Use your hands to work the butter into the mixture until fully mixed and slightly crumbly. The smaller you dice the butter the easier this step will be.
Pour apple filling into a greased 12 inch cast iron skillet and distribute evenly. Top with streusel, forming an even layer. Bake for 35 minutes uncovered. The apples should be very tender when pierced with a toothpick.
Let cool slightly and serve topped with vanilla or cinnamon ice cream.