In a mixer cream butter, sugar, eggs and vanilla. Then add flour, soda, salt, and rolled oats and mix.

Place two-thirds of the mixture in a greased 9 x 13" pan. Press down.

Melt chocolate chips and butter. Add sweetened condensed milk, salt, and vanilla.

Pour chocolate mixture over oatmeal dough and spread.

Drop pieces of the remaining dough on top of the chocolate layer

Bake at 350 for 25 minutes

Let cool completely before cutting into bars.