Combine melted browned butter with dry ingredients. Spread dough evenly across the bottom of a parchment lined 9×13 pan. Bake for 20 minutes or until lightly browned.
Place apples, sugar, butter, lemon juice, cinnamon and nutmeg in a pot. Cook until bubbling and the apples are tender. Add cornstarch and stir until thickened. Set aside.
In a medium bowl combine the all-purpose flour, brown sugar, cinnamon and pinch of salt. Add melted butter and mix until well combined. Use clean hands to break into crumbs.