For this peanut butter apple crumble, tart granny smith apples are smothered in brown sugar and peanut butter. They're topped with a peanut butter crumble and baked until bubbly. The apples come out tender and are soaking in an apple infused peanut butter sauce.
In a large bowl, add flour, oats, and sugar. Whisk together until incorporated and there are no lumps.
Add in the butter and peanut butter. Using a fork, cut in the butter/peanut butter until it resembles small pebbles. Set aside.
Filling
In a large bowl, add in brown sugar, flour, and cinnamon. Whisk together until combined and no lumps are left.
Add in the peanut butter and stir with spatula until it's incorporated into the dry mixture.
Add in the apples and stir until the apples are completely coated.
Pour the apples into a 10-inch pie plate. Pile the crumble topping on top of the filling.
Place into a 350 degree oven for 40 - 45 minutes or until golden brown and bubbly. Mine took 45 minutes. Place tin foil underneath dish just in case any filling bubbles over.