1Your favorite dark chocolate brownie mix, such as Duncan Hines, mixed and baked according to package directions, cooled
1tsp.root beer extract, optional
1/4cupchocolate chips melted
To make the frosting, mix the butter and powdered sugar together in a large mixing bowl, using an electric mixer. Slowly add the root beer and root beer extract, beating the frosting until smooth. Frost the brownies, then drizzle with the melted chocolate chips.