I followed the directions to acheive a brownie bar like the pic posted of it, but was not successful. So, what I did instead was mix everything together- marshmallows and chocolate topping. However, for my second batch, I spread the chocolate topping on the just baked brownies and then topped them with the marshmallows, popped them back in the oven for about 4 mins, and voila!, a layered effect. I bought the "standard" (I don't recall the actual flavor) chocolate "Family Size" brownie mix, made the brownie-like mixture, and baked in a 9x13 pan. This serving was perfect. I made these instead of a cake for my kid's bday party and EVERYONE loved them! I will definitely be making these again.