I made a batch of decadent brownies the other day and now they are almost gone. My purpose in making them was to use up a bit of leftover buttercream icing from, oh, maybe August. That was our last birthday celebration, so that's what the icing was probably left over from.
First I used a brownie mix for the bottom layer (purchased on sale with a coupon, of course), but I baked it in a 9"x13" pan. Then I stirred a little cream cheese into the leftover icing and spread it over the cooled brownies. Finally, I melted about half a package of chocolate chips with a little shortening and poured and spread it over the icing. A little chilling in the refrigerator and they were ready to eat.
But~we found them tastier after sitting in the refrigerator for a day.