Mom's Chocolate Chip Bars

This recipe is SO good and I haven't made it in years. That's about to change!!! It's a well yellowed and stained card from my mom's recipe box.

1 cup butter scant

1/2 c. brown sugar

1/2 c. sugar

2 egg yolks

1 t. soda

salt

1 t. vanilla

2 c. flour

Mix in order given pat into pan and sprinkle with 1 cup chocolate chips. Bake 350 for 15 min. until brown. Beat egg whites stiff with 1/2 c. brown sugar. Spread over baked crust. Sprinkle with walnuts. Bake at 350 -10 min. Cut and cool.