01 -
Preheat the oven to 163°C. Generously coat a 25 cm cast iron skillet or other oven-safe skillet with cooking spray.
02 -
Using an electric mixer fitted with the paddle attachment, beat the butter on medium-high speed for 1 minute until creamy. Add granulated sugar and light brown sugar, then beat for 2 minutes until light and fluffy. Scrape down the bowl with a rubber spatula.
03 -
On low speed, add eggs, vanilla extract, and espresso powder. Beat until thoroughly combined. Scrape down the bowl again to ensure even mixing.
04 -
In a separate bowl, whisk together flour, cornstarch, baking soda, and salt until evenly distributed.
05 -
With the mixer on low, gradually add the dry mixture to the wet ingredients. Avoid overmixing to maintain a tender texture.
06 -
Fold the semi-sweet chocolate chips into the dough using a rubber spatula or wooden spoon until evenly incorporated.
07 -
Evenly spread the cookie dough into the prepared skillet using a spatula or spoon, ensuring uniform thickness.
08 -
Bake for 30 to 35 minutes, or until the center is just set and the top is lightly golden brown.
09 -
Remove the skillet from the oven and allow it to cool for approximately 10 minutes before serving. Serve with optional toppings like vanilla ice cream, whipped cream, chocolate sauce, or fresh strawberries if desired.