The name here says it all:  a chcolatey, chewy brownie base with peanut butter chips and a swirl of marshmallow fluff.  Save me the edge pieces!  They're my favorite.
 
This one has all the flavors that kids (and kids at heart) will love.
 
The full recipe makes a 9 x 13 pan.  That is $23.   For an adult with a sweet tooth, a 2" x 2" brownie (or two, or three) is a good snack and the 9 x 13 will yield about 24 of those.  It's easy to cut to other sizes, however.