4. Condensed Milk
One mix in for your brownies that you likely have not thought about is a can of condensed milk. Why would you ever add this to your perfectly fine brownie mix? Well, it may sound weird, it is actually quite genius.
When you pour a can of condensed milk over the top of your brownie mix and then use a knife or a skewer to swirl it around making a marbled like design you are actually on your way to creating dulce de leche. Simply bake your brownies as normal. When the condensed milk is baked it will turn brown and caramelize. This will create beautiful golden stickiness throughout your entire brownie mix.
If you truly want to make your brownies stand out, try mixing a bit of coffee into the condensed milk first. This will create a wonderful coffee and caramel flavor throughout your entire pan of brownies.