Triple Chocolate Mud Bars

Directions

1. 1
   Preheat oven to 350 F.
2. 2
   Grease a 13x9-inch baking pan.
3. 3
   Beat butter and sugar at medium speed with an electric mixer until light and fluffy then add in egg yolks, one at a time, until blended.
4. 4
   Mix flour, cocoa, baking powder, and salt until well combined then fold into the butter mixture.
5. 5
   Stir in milk chocolate chips.
6. 6
   Press mixture firmly and evenly into the pan.
7. 7
   Sprinkle with nuts, semi-sweet chocolate chips, butterscotch chips and marshmallows.
8. 8
   Whip egg whites until stiff peaks form then fold in the brown sugar.
9. 9
   Spread egg whites over the mixture in pan.
10. 10
    Bake for 35 minutes or until a crust is formed.
11. 11
    Cut into 36 bars.