Position oven rack to the center and preheat to 350 degrees F. Spray a 10 inch cast iron skillet with Pam Baking spray or butter the pan and sprinkle with flour tapping out the excess flour. To make the cake
, combine dry ingredients (flour, sugar, baking soda, salt, cinnamon, nutmeg) in to a mixing bowl and mix together well. Add grated apples, softened butter and eggs to the dry ingredients and use an electric mixer to beat together. mix ingredients on medium speed for about 2 minutes or until everything is well combined. The batter will be very thick. Spread the batter evenly into the skillet. Transfer to the oven and bake for 35-40 minutes or until the top is brown and a toothpick inserted into the center of the cake comes out clean. Allow cake to cook completely in the skillet.To make the frosting
, melt the butter in a small saucepan. once completely melted add the brown sugar and stir continuously until the sugar dissolves. Carefully add the 3 Tbsp. of milk all at once, stirring constantly. When the butter, sugar and milk come to a boil, turn off the stove and remove the pot from the heat. Transfer to a mixing bowl and let it sit for 10 minutes. After the caramel has cooled for 10 minutes in a mixing bowl, Add the vanilla extract and the sifted powdered sugar. Stir well with a whisk until creamy and all incorporated. If you like the frosting to be a bit more fluffy, use an electric hand mixer to add more air to the frosting.
Spread frosting on the completely cooled cake and top it with chopped pecans. Cut and serve.