Reese's S'More Magic Layer Bars

1 yellow cake mix

1 egg

1/2 c. unsalted butter, softened

1/3 c. creamy peanut butter

1/2 c. frozen mini marshmallows

1/2 c. milk chocolate chips

1/3 c. white chocolate chips

3/4 c. Reese's Pieces Candy

1 (14 oz.) can sweetened condensed milk

1/4 c. milk chocolate chips + 2 Tbl. peanut butter, for drizzle

Preheat oven to 350 degrees.  Combine cake mix, egg, butter and 1/3 cup peanut butter and mix together until a dough forms.  Press into the bottom of a 9x13-inch baking pan that has been lined with parchment paper and sprayed with cooking spray.  Bake for 10 minutes.

Remove from oven and top with frozen marshmallows, 1/2 cup chocolate chips, white chocolate chips and Reese's Pieces Candy.  Pour the sweetened condensed milk over the top.  Bake for 20-22 minutes.  The marshmallows will get very brown.  If you don't want them to brown as much, tent a piece of foil over the top for the last few minutes of baking.  Cool completely.  Melt 1/4 cup milk chocolate chips and 2 Tablespoons of peanut butter in the microwave, stirring every 30 seconds, until smooth and creamy.  Use a fork and drizzle over cooled bars.  Cut into bars and serve.  Makes 15 bars.  

slightly adapted from: Le Creme De La Crumb