To make an amazing extra-large cookie in an extra-large, 15″ cast iron pan, simply increase serving size above to 12 servings and bake an extra 5-10 minutes. Of course, I know you can’t add one and a half eggs, so you’re gonna have to make a judgement call there. With our farm fresh eggs, I will choose one extra large one or two extra small ones. (We always have young hens as well as adult hens on the homestead, and their egg sizes vary greatly, which comes in very handy sometimes.)
We also love making single-serving chocolate chip cookies in individual-size mini cast iron griddle pans. For that, we have found that using the standard cookie recipe on the Nestle Toll House chip bag yields the best results. We’ll put a large mound on the single-serving cast iron pan and bake for 8-10 minutes or until center is done. Then we top the warm-out-of-the-oven individual cookies with ice cream and eat dessert right out of the pan.