Double Chocolate Mud Bars (Yummy Gooey Bars)

15 Min prep, 35 min baking.

Makes 36 bars

1/2 cup (1 stick) butter or margarine
1 cup granulated sugar
2 large eggs, separated
1 1/2 cups flour
1 t. baking powder
1/2 t salt
1 cup chopped walnuts (I omit the nuts)
1/2 cup semisweet chocolate chips (I increase to 1 cup)
1 cup mini marshmallows
1 cup firmly packed brown sugar

1. Preheat oven to 350. Grease 13x9 pan.
2. Beat together butter and sugar until light and fluffy. Beat in egg yolks, one at a time.
3. Mix together flour, baking powder, and salt. Fold into butter mixture.
4. Press into prepared pan. Pack down firmly. Sprinkle nuts, chips, and marshmallows over the top. (Add more if it looks too sparse.)
5. Beat egg whites at high speed until stiff peaks form. Fold in brown sugar. Spread over mixture in pan.
6. Bake for 35 min.
7. Devour