Double Chocolate Walnut Skillet Brownie

"Nothing beats a good ooey gooey Double Chocolate Walnut Skillet Brownie with a large glass of milk. You’ll need only a few ingredients to make this delicious skillet brownie! Depending on you preference, you can have this double chocolate walnut skillet brownie either with a a big scoop of ice cream or a tall glass of milk. To make this recipe, you will need a 5 inch cast iron skillet and just a few ingredients!"