Preheat oven to 350 degrees F and line 8″ x 8″ metal baking dish with parchment paper and spray with cooking spray. Set aside.
In a large bowl, add zucchini, egg, oil, applesauce, maple syrup, vanilla extract, cinnamon, baking powder, baking soda and salt. Whisk well – sometimes if baking soda and baking powder have lumps, it takes a minute to let them sit and then whisk again.
Add flour and stir with spatula just until combined.
Transfer batter into prepared baking dish, level with spatula and bake for 40 minutes or until toothpick inserted in the middle comes out clean.
Remove from the oven and let cool for 5 minutes, then transfer to a wire rack to cool off for another 2-3 hours or completely.
While cake is baking or cooling, make the cream cheese frosting. In a large bowl, add cream cheese, Greek yogurt, maple syrup and vanilla extract. Using an electric mixer on high speed, whip until smooth, pausing and scraping down the sides. Refrigerate until ready to use.
Transfer on top of a cake and spread with a spatula. Using a sharp knife, cut into 12 slices and enjoy.
Notes
Store: Refrigerate frosted cake within 2 hours of frosting in an airtight container for up to 4-5 days. Without frosting, keep in a cool dry place for 2 days.
Freeze: Freeze in an airtight container for up to 3 months. Thaw in the fridge overnight.