1/2 cup brown sugar
1/2 cup granulated sugar (white)
1 cup butter
Add the following and beat again:
2 egg yolks (save the egg whites in a separate bowl)
1 Tablespoon water
1 teaspoon baking powder
1/2 teaspoon baking soda
pinch of salt
2 cups flour (I love adding the baking powder, baking soda and salt with the flour).
Spread dough in pan (9x13)
Sprinkle/spread 1 package chocolate chips over top of dough layer.
Then spread topping over chips.
Beat egg whites (in the bowl) with 1 cup of brown sugar until creamy color and lightly whipped consistency.
Bake 350 degrees for 20 minutes.