Double Chocolate Mud Bars

Directions

1. 1
   Preheat oven to 350°.
2. 2
   Grease a 13 x 9-inch baking pan.
3. 3
   Beat together butter and sugar at medium speed until light and fluffy. Beat in egg yolks, one at a time, until blended.
4. 4
   Mix together flour, baking powder and salt.
5. 5
   Fold flour mixture into butter mixture.
6. 6
   Press mixture into prepared pan.
7. 7
   Pack down firmly. Sprinkle nuts, chocolate chips and marshmallows over the top of mixture in pan.
8. 8
   Beat egg whites at high speed until stiff peaks form.
9. 9
   Fold in brown sugar.
10. 10
    Spread over mixture in pan.
11. 11
    Bake for 35 minutes or until a crust is formed.
12. 12
    Transfer pan to a wire rack to cool completely.
13. 13
    Cut into squares.
14. 14
    Makes 36.