Apple Pie Bars

Preheat oven to 350° and line a 9”-x-13” pan with parchment then grease with cooking spray. In a large bowl using a hand mixer, beat butter and sugars together until light and fluffy. Add flour and salt and mix until just combined.  Press into prepared pan about 1/2” up sides. Bake until lightly golden, 20 minutes.  Sprinkle crumb topping over apples and bake until top is golden and apples are soft, about 1 hour.