This skillet cookie is loaded with milk chocolate, dark chocolate, and caramel for an irresistible family treat that is made right in one skillet for easy clean up! No mixer required!
Preheat oven to 350 degrees. In an 8-inch Cast Iron Skillet, heat the butter over low heat until melted.
Remove from the heat and stir in the sugar with a wooden spoon. Let sit for 10 minutes to cool.
Add the egg and vanilla to the skillet and stir to combine.
Add the flour, cornstarch, baking soda, and salt to the skillet and gently stir with a wooden spoon. Your skillet will be a bit full, so stir gently to avoid spilling.
Once the ingredients are combined well, stir in the Hershey's Kisses.
Bake for 12 minutes. Let cool for 5 minutes before serving.