Spray 9x13 baking dish with cooking spray.
Once apples are peeled and sliced, wrap a Crescent roll around each apple, pinching tightly so it's completely covered.
Place in baking dish, a few inches apart.
Melt butter in microwave on low.
Add cinnamon and sugar to butter and stir well. Pour mixture over crescent rolls.
Slowly pour Mountain Dew over crescent rolls, making sure to cover completely.
Bake at 375 for 35-45 minutes, until golden brown.