2 c. butter
1 c. brown sugar
1/2 c. white sugar
4 egg yolks
2 c. oatmeal
2 c. sifted flour

Cream butter, brown sugar, white sugar, and egg yolks. Add oatmeal and flour. Bake in greased 9 x 13 pan at 350 degrees for 25-30 minutes. Spread chocolate chips on top and return to oven to soften chips. Spread evenly.