In a medium sized saucepan melt the 1 tbsp of butter on med-low heat. Add in the chopped apple and cook for about 5-6 minutes, just until the apples are fragrant and starting to soften.
Transfer the apples to a small bowl and set aside.
To the same saucepan add the remaining butter and cinnamon and return to the heat. Stir until melted scraping up any little bits of apple on the bottom of the pan.
Remove from the heat and stir in the sugars and maple syrup. Stir in the beaten eggs and vanilla.
In a separate bowl whisk together the flour, baking powder, salt and baking soda.
Add the dry ingredients to the butter mixture. Stir until the flour is all combined and then add in the cooked apples.
Transfer to the prepared pan and bake 25-30 minutes or until the top is just golden.