Combine the flour mixture with the creamed mixture and blend thoroughly.
Spread the batter into the baking pan, patting with your hands if need be.
Sprinkle chocolate chips, marshmallows, and nuts over the batter.
1 cup chopped nuts, 1 cup mini marshmallows, 1/2 cup Nestle semi-sweet chocolate chips
In a large bowl, beat egg whites until stiff. Fold in brown sugar until well combined.
2 egg whites, 1 cup packed brown sugar
Spread the brown sugar meringue over the top of the mini marshmallow layer, spreading to touch the edges of the pan to prevent it from shrinking during baking.
Bake at 350 for 30 to 40 minutes, or until lightly browned on top. Cool completely and then cut into bars.