Preheat: Preheat the oven to 375°F.
Cream butter & sugar: Add the softened butter, brown sugar, and granulated sugar to the bowl of stand mixer, or a mixing bowl if you are using hand mixer/spoon. Cream the butter and sugars together using the paddle attachment on a stand mixer, until the mixture is pale brown in colour, and is fluffy in consistency.
1 cup Unsalted butter, 1 ¼ cup Brown sugar, ½ cup Granulated sugar
Mix wet ingredients: Add the eggs and vanilla extract to the creamed butter and sugar, and combine together until the eggs have smoothly combined into the butter and sugar mixture.
2 Large eggs, 2 teaspoon Vanilla extract
Mix dry ingredients: In a separate mixing bowl, whisk together the dry ingredients so everything is well combined.
2 ¾ cup All purpose flour, 1 teaspoon Baking soda, 2 teaspoon Corn starch
Combine dough: With the mixer on low speed, slowly add the dry ingredients to the wet ingredients. It may be helpful to do this with a large spoon to prevent flour from flying out of the mixer. Once the dough has formed, mix in the chocolate chips.
2 cups Semi-sweet chocolate chips
Freeze: Put the cookie dough in the freezer for 15-20 minutes, to allow for the butter to firm up.
Prep for baking: Transfer the cooled dough to a greased cast iron skillet. Press the dough in so that it is an even layer.
Bake: Bake the cookie for 15-20 minutes. It will still appear soft, but will firm up as it cools down. Top with vanilla ice cream, and optionally chocolate fudge and caramel sauce.