Preheat the oven to 350 degrees. Grease a 12” cast iron skillet. I use my cake release/goop. A light spray of non-stick spray or a couple of tablespoons of shortening will work well, too.
In a medium bowl, whisk the flours, salt, baking soda, and baking powder together. Set aside.
In a stand mixer bowl, combine the butter, vanilla, and sugars on medium until light and fluffy, approximately 2 minutes. Alternatively, you can use a hand-held mixer.
On medium-low, add the eggs, blending well after each addition.
Add the flour mixture and blend on low until almost all the flour has been incorporated.
Stir in the toffee, pecans, and 1 ½ cups chocolate chips. Combine all the ingredients together.
Gently and evenly press the cookie dough into the skillet. Sprinkle the remaining ¼ cup chocolate chips over the top.
Bake the cookie in the preheated oven for 30 to 35 minutes or until just baked in the middle, a toothpick inserted comes out clean, no wet batter.
Remove from the oven and allow the cookie to cool for 15 to 20 minutes or longer before cutting into wedges. (Or just dive in with some friends and spoons!)
For a really loaded cookie, serve with vanilla ice cream and caramel.