0 Preheat the oven to 350 F and grease a 9×9 (or 8x8) pan or line with parchment paper.
1 To make the cake, place the flour, baking powder, baking soda, and salt in a large bowl and whisk to combine. Then, add the butter, eggs, vanilla, maple syrup, and milk, and whisk until fully incorporated. Finally, stir the apples into the batter.
2 Pour half of the cake batter into the bottom of an 9×9 (or 8x8) pan, then sprinkle the 1/3 cup sugar over top, as evenly as possible, followed by the teaspoon of cinnamon. Pour the remaining cake batter over top and spread evenly.
3 To make the crumble, add the flour, sugar, and spices, to a bowl and whisk to combine. Then, stir in the butter until a crumbly mixture forms and mix in 1/2 cup of chopped apples and the pecans.
4 Sprinkle the cinnamon crumble on top of the coffee cake batter, then bake for 50-60 minutes, until a toothpick inserted into the middle of the cake comes out clean.
5 While the cake is cooling, whisk together the powdered sugar, vanilla, and cream for the icing, then drizzle over top and serve!
