Preheat the oven to 350 °F (177 °C) and line an 8x8-inch baking pan with parchment paper.
Cream the butter, white and brown sugar together in a large bowl until light and fluffy then add the egg and whisk again to combine.
In a separate large bowl whisk the flour, apple pie seasoning, baking powder, baking soda, cinnamon and salt together then add it to the wet ingredients.
Stir it together then add the apples and stir once again to combine.
Press the mixture into the prepared baking pan then bake for 25 to 35 minutes or until light and golden on top and a toothpick comes out clean when inserted into the center.
Let it rest for 20 minutes before slicing and serving.
Notes
These apple blondies can be stored in an airtight container for up to five days.