1. Cream egg yolks with sugars and margarine.
2. Add vanilla, then all dry ingredients.
3. Put dough in a 9×13 pan. Put chocolate chips, coconut, and walnuts.
4. Beat the reserved whites with 1 C brownulated brown sugar until stiff. Spread over the cake.
5. Bake at 325 for 40 minutes.
6. Let cool completely cut into squares.