Preheat your oven to 350 degrees. Place the rack on the middle position.
Peel and chop the apples into small chunks, think diced size at about ½″. Chop the walnuts or pecans as well.
In a large bowl, with a hand mixer, beat together the softened butter, sugar, vanilla, and egg until light and fluffy.
In a medium bowl, whisk together the flour, and other dry ingredients through salt. Pour the dry ingredients into the wet ingredients and mix together with the hand mixer.
Fold in the nuts and chopped apples with a spatula.
Spray your cast iron skillet (or traditional 8×8″ pan), with non-stick spray.
Spread the batter out in the pan, it is thick, so it doesn’t need to be smoothed out completely.
Bake in a 10″ cast iron pan, starting at 25 minutes. If baking in 8×8″ pan, the instructions say to bake for 45 minutes.
Cool on a wire rack and serve while warm. With ice cream.
