Mix:

1 c. butter
2 c. brown sugar

Add:

2 eggs
2 1/2 c. flour
1 tsp. baking soda
1 tsp. salt
2 tsp. vanilla
3 c. oatmeal

Mix well and spread in a greased jelly roll pan, saving 1/3 of dough to put on top.

TOPPING:

In a pan over low heat or microwave melt:

1 (12 oz.) pkg. milk chocolate chips
1 (14 oz.) can sweetened condensed milk
1 tbsp. butter

Add:

1 tbsp. vanilla

Pour mixture in jelly roll pan. Dot the reserved 1/3 dough over topping. Bake at 350 degrees for 20 minutes.