Fudgy, chewy chocolate brownie cookies with a crisp edge and soft center, perfect for snacking or gifting.
1/2 cup unsalted butter, softened
1/2 cup granulated sugar
1/2 cup brown sugar, packed
2 large eggs
1 teaspoon vanilla extract
1/2 cup all-purpose flour
1/2 cup unsweetened cocoa powder
1/2 teaspoon baking powder
1/4 teaspoon salt
3/4 cup chocolate chips or chunks
1/2 cup chopped walnuts or pecans (optional)
Underbake slightly for fudgy centers; add swirls or toppings for variation.