Step 1

Preheat oven to 350˚F.

Step 2

To an 8-inch or 9-inch baking dish, add the diced fruit, brown sugar, flour and salt. Toss everything together to coat; set aside.

Step 3

In a medium mixing bowl, combine the graham cracker crumbs, flour, brown sugar, and salt.

Step 4

In a small mixing bowl, whisk together the melted butter and vanilla.

Step 5

Using a spoon, mix and stir the melted butter into the graham cracker mixture until the crumbs are moist.

Step 6

Spread crumb topping over the fruit, pressing down with the back of a spoon or with your hands to create an even layer.

Step 7

Bake for 25 minutes, or until the crust is golden brown and mixture is bubbling up.

Step 8

Remove apple crumble from oven, then set oven to BROIL.

Step 9

In the meantime, top the apple crumble with marshmallows in one single layer.

Step 10

BROIL the apple crumble for 3 to 4 minutes, or until marshmallows are browned and toasted on top. Watch it closely so that the marshmallows don't burn.

Step 11

Remove from the oven and let cool for 5 to 7 minutes.

Step 12

Serve warm or at room temperature.