I made these Peanut-Mallow Brownies (from the King Arthur Flour Cookie Companion) for my niece’s First Communion celebration this afternoon. I used the Fudgy Brownie recipe from the book as the foundation. C. took one look at the finished brownies last night and proclaimed that they looked much more like the kind of brownies he likes before realizing that they had a peanut butter filling. The filling is actually peanut butter, confectioners’ sugar and mini marshmallows all melted together (very sticky!) and the effect is more Mary Jane than Reese’s — the peanut flavor is very subtle and they are ultra-gooey and taffylike. Definitely decadent and very addictive!