Preheat your oven to 350ºF and prepare a 9×13-inch cake pan by lining it with parchment paper or using nonstick cooking spray.
In a large bowl, combine all the dry ingredients and set aside.
In another bowl, whisk together the brown sugar, maple syrup, and vanilla extract until smooth.
Add the applesauce, shredded apple, Greek yogurt, and almond milk to the wet ingredients and mix well.
Crack the eggs into a separate bowl, whisk lightly, and add them to the wet ingredients, mixing until just combined.
Gradually add the dry ingredients to the wet mixture, stirring until well combined.
Pour the batter into the prepared pan and bake for 30-33 minutes, or until a toothpick inserted into the center comes out clean.
While the cake bakes, prepare the cream cheese frosting by mixing all the frosting ingredients until smooth.
Once the cake is baked, allow it to cool completely before frosting.
Dust the cake with a sprinkle of chai spice or top it with your favorite chopped nuts.