Step 1

Preheat grill to high (or preheat oven to 450F), place two large sheets of foil on the counter (approximately 12x18-inches); set aside.

Step 2

Apples - To a medium bowl, add all ingredients, stir to combine, cut butter into the dry ingredients with a fork, and distribute apple mixture evenly between the two sheets of foil in mounded piles; set aside.

Step 3

Crumble Topping - To the same bowl, add all ingredients (except salted caramel sauce and whipped topping), stir to combine, cut butter into the dry ingredients with a fork, and evenly top the apple mounds with the crumble topping mixture.

Step 4

Seal up foil packs tightly around the edges to trap the steam in, place packs directly on grill grates, lower the heat to medium, close the grill cover, and cook for about 7 minutes, or until done (bake in the oven for about 15 minutes or until done). Because all ovens and grills vary in their heat output, it's hard to say exactly how long to cook the packs. I estimate as short as about 7 minutes and as long as about 15 minutes but it's highly variable; make sure to keep a watchful eye so they don't burn. Place packs on a plate, allow them to rest for 1 to 2 minutes, and be careful when you open the packs (use oven mitts) because there is a lot of steam.

Step 5

Drizzle with salted caramel sauce to taste and optionally add whipped topping before serving. Recipe is best warm and fresh.