Step 1

Preheat the oven to 350 degrees and line an 8 “square baking pan with foil. Lightly grease with cooking spray and set aside.

Step 2

Begin by preparing the crust. In a large bowl or the bowl of a stand mixer, cream the butter and granulated sugar until smooth. Stir in the vanilla. Add the flour and salt and stir just until combined to crumbs. Gently press the mixture down flat into the bottom of the prepared pan and bake in the preheated oven for 15 minutes. In the meantime, begin making the filling.

Step 3

Toss all of the filling ingredients together in a bowl. Set aside. In a separate bowl, toss all the flour, oats, brown sugar, and salt together. Stir in the butter to form a clumpy mixture and set aside. When the shortbread crust has finished baking, remove from oven and evenly layer in the apple filling. Sprinkle the crumble topping evenly over the apples and bake an additional 35 minutes, or until the topping is turning golden brown. Allow to cool completely prior to cutting into 16 squares.