Add the butter to a large skillet and turn on medium-high heat.
In a large resealable bag add the sugars, apple pie spice and cornstarch and shake to mix.
Peel and core the apples then slice into ¼" thick slices.
Add the apple slices to the resealable bag with the sugar and spice and shake well to mix. Make sure all the slices are evenly coated.
Once the butter has melted add the apple slices to the skillet along with the apple juice and move around a little to even out.
Cover, turn down the heat to medium-low and cook for 15 minutes, stirring occasionally.
Once the apples have nicely softened serve immediately.
Notes
If you don't have a lid for your skillet you can cover with aluminum foil.If you don't have a resealable bag go ahead and using a mixing bowl. I feel moving the slices around in the bag really helps distribute those ingredients nicely.