Step 1

Mix together the flour, oats, brown sugar, and salt in a medium bowl.

Step 2

Then using two forks incorporate the butter into the flour mixture until it becomes small crumbs.

Step 3

Set aside while you prepare the mason jars.

Step 4

Prepare mason jars with a light butter coating to make them nonstick, and line a small baking sheet with parchment paper.

Step 5

Spoon a few tablespoons of apple pie filling evenly into each buttered mason jar.

Step 6

Top each filled mason jar with the crumb topping.

Step 7

Bake in a preheated 350 degree oven for 35 minutes or until the crumb topping has browned.

Step 8

Remove the mason jars from the oven and let cool 10 minutes.

Step 9

Serve warm with ice cream and maybe a extra sprinkle of brown sugar!