This recipe is good. I used the other suggestions and swirled the pb mixture in. For some reason some of the bottoms were burned? However,the ones that weren't, were very tasty. I did have to cook them an additional 5 minutes or so,but really no reason for the bottoms to be randomly burnt. They come out like a "stiff" brownie, Not like a moist and gewy one. I still liked the recipe though.the cool whip I s good with it. A good balance to a rich brownie.