In a large bowl, whisk together the flour, brown sugar, granulated sugar and ground cinnamon for the crumble topping. Work in the melted and cooled butter a couple of teaspoons at a time until a sand like texture develops.
Bake the coffee apple cake for 50 - 55 minutes. – Cool the pan in the pan for 15 - 20 minutes. Gently remove the cake from the pan and transfer to a serving plate. Top with powdered sugar or a glaze, slice and enjoy!