How can I fix brownies that I accidentally added ketchup and pepper to?
Perhaps your brownies could be saved, and even improved, by the addition of a caramel layer on the top, creating a salted caramel and chocolate version. Simply  boil sugar with a small amount of water until it's a deep golden amber color, take off the heat and whisk in several tablespoons of heavy cream and several of butter. Drizzle over the top, before or after cutting into squares, and let cool completely.