Fudgy Chocolate Brownie Cookies with a soft, chewy center and slightly crisp edges, loaded with chocolate chips.
1/2 cup unsalted butter, softened
1/2 cup brown sugar, packed
1/4 cup granulated sugar
1 large egg
1 teaspoon vanilla extract
1/2 cup all-purpose flour
1/4 cup unsweetened cocoa powder
1/4 teaspoon baking soda
1/4 teaspoon salt
1/2 cup chocolate chips or chunks
Slightly underbake for extra fudginess. Optional: add nuts, caramel, or white chocolate.