These peanut butter chocolate brownies are a rich and decadent dessert that is perfect for chocolate and peanut butter lovers alike. The brownies are made with a fudgy chocolate batter and a swirl of creamy peanut butter. To make the swirl, simply drop spoonfuls of peanut butter onto the batter and swirl with a knife. Bake until golden brown and serve with a glass of cold milk for the ultimate treat.