Apple crumble cake is a moist and buttery vanilla crumb cake filled with chunks of sweet and tart apples. It’s topped with a crunchy cinnamon crumble and powdered sugar.
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.
In a large mixing bowl, cream the sugar and butter together until light and fluffy. On low, beat in the eggs and vanilla extract until smooth and well combined.
Alternating dry ingredients and sour cream, mix in ? of the dry ingredients into the wet, followed by ½ of the sour cream. Fold in the the cinnamon apples until just combined.
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!