These brownies look amazing and i can't wait to make them soon. I got the recipe from Big Mama's Kitchen
1 Box Duncan Hines Chewy Fudge Brownie Mix
1/2 cup oil
1 cup semi-sweet chocolate chips
1 bag (10.5 oz) miniature marshmallows
1 1/2 cups milk chocolate chips
1 T unsalted butter
1 cup crunchy peanut butter
1 1/2 cups Rice Krispies cereal
Preheat oven to 350 degrees. Line a 9x13 cake pan with wax paper with a overhang on all sides. This makes it easy to lift out the brownies before cutting into bars.
Add brownie mix, eggs, oil, and semi-sweet chocolate chips to a bowl and mix well. Pour into prepared cake pan. Bake for 25-28 minutes, or until toothpick comes out clean 1 inch from the outside edge.
Remove brownies from oven and immediately top with marshmallows. Return to oven for 4 minutes.
Meanwhile, in a medium sauce pan over low heat, add the milk chocolate chips, butter, and peanut butter. Stir constantly until just melted. Turn off the heat and stir in the Rice Krispies. Spread mixture evenly over the marshmallows.
Set the pan on a wire rack to cool to room temperature. Cover and refrigerate for at least 2 hours. Lift brownies out of pan using wax paper overhang. Cut into 1 inch bars. Enjoy!