Preheat oven to 350º. Grease a cast iron skillet with vegetable shortening.

In a large bowl, add softened butter and sugars. Beat until fluffy.

Add egg and vanilla to the sugar mixture and beat until combined.

In a medium bowl, add flour, baking soda, salt, and cinnamon.

Gradually beat in dry ingredients to wet ingredients.

Fold in chocolate chips and chopped pecans.

Press cookie dough into the bottom of the prepared cast iron skillet.

Bake for 25 minutes or until edges of the cookie are golden brown and a toothpick comes out clean from the center.

Allow cookie to cool before serving.